United States v. Hernandez, Javier ( 2008 )


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  •                             In the
    United States Court of Appeals
    For the Seventh Circuit
    No. 07-1134
    U NITED S TATES OF A MERICA,
    Plaintiff-Appellee,
    v.
    JAVIER H ERNANDEZ,
    Defendant-Appellant.
    Appeal from the United States District Court
    for the Central District of Illinois.
    No. 05 CR 10062—Joe Billy McDade, Judge.
    A RGUED JANUARY 14, 2008—D ECIDED S EPTEMBER 12, 2008
    Before P OSNER, K ANNE, and W ILLIAMS, Circuit Judges.
    W ILLIAMS, Circuit Judge. Javier Hernandez pled guilty
    to conspiring to knowingly distribute cocaine. In the
    plea agreement, the parties agreed to have the district
    court determine, beyond a reasonable doubt, the quantity
    of drugs for which Hernandez would be held accountable
    in determining his sentence. Because it is unclear how the
    district court arrived at its drug quantity calculation,
    we cannot determine whether the government met its
    2                                             No. 07-1134
    burden so we find that the district court committed clear
    error. We remand this case to the district court to deter-
    mine the amount of drugs attributable to Hernandez.
    I. BACKGROUND
    Javier Hernandez was charged with conspiring to
    knowingly distribute cocaine, in violation of 
    21 U.S.C. § 841
    (a)(1). The indictment alleged that more than five
    kilograms of cocaine and fifty grams of crack were in-
    volved in the conspiracy. Pursuant to his plea agreement,
    Hernandez pled guilty to distributing only one kilogram
    of cocaine. His plea agreement also stipulated that any
    further drug quantities had to be proven beyond a rea-
    sonable doubt at sentencing. The district court agreed to
    apply the burden of proof stipulated to by the parties in
    determining the drug quantity attributable to Hernandez.
    At the sentencing hearing, Darrell Daily, Melvin Harmon,
    Troy Powers, and Eric Keith testified that Hernandez
    provided them with at least 196 kilograms of cocaine
    over the course of the conspiracy. Daily testified that in
    September of 2001, Hernandez supplied him with one
    kilogram of cocaine. Daily then sold this cocaine to
    Harmon, who sold it to Dumond and Courtney Morris.
    Hernandez later provided Daily with another kilogram
    of cocaine after Harmon indicated that the first kilogram
    was “bad,” or unusable. In the remaining months of 2001,
    Daily continued to sell small amounts of cocaine to the
    Morrises indirectly through Harmon. Harmon testified
    that he sold two to three kilograms per month to the
    Morrises for the remaining months of 2001.
    No. 07-1134                                             3
    According to the testimony at the hearing, the drug
    quantities that Daily obtained from Hernandez increased
    substantially in 2002. In 2002, Hernandez supplied Daily
    with between one and twelve kilograms of cocaine on
    multiple occasions, and seventeen kilograms of cocaine
    on one occasion. Daily supplied Harmon, who sold the
    Morrises at least six kilograms of cocaine every month in
    2002. There were also at least two occasions in 2002 where
    Daily supplied the Morrises directly with six to seven
    kilograms of cocaine. By this time, Daily had a supplier
    other than Hernandez, but it is not clear if Daily began
    purchasing cocaine from this alternate source in 2002
    or 2003.
    In 2003, Daily sold approximately twenty-five kilograms
    of cocaine to Harmon. In late 2003, Hernandez provided
    Harmon with fifty kilograms of cocaine directly. In
    2004, Hernandez continued to supply Harmon, who sold
    approximately seventy kilograms of cocaine to the
    Morrises that year. Harmon was arrested in March 2005
    for attempting to sell one kilogram of cocaine, which
    had been provided by Hernandez, to a third party.
    Powers testified that in the fall of 2003, he purchased
    four and a half ounces of cocaine from Hernandez. He
    also purchased a similar amount of cocaine from
    Hernandez on two to three other occasions that year. In
    2004 and 2005, Powers purchased one to three kilograms
    of cocaine once or twice a month from Hernandez until
    Hernandez’s arrest in June 2005. Powers estimated that he
    received fifteen to twenty kilograms of cocaine from
    Hernandez from early 2004 until June 2005.
    4                                               No. 07-1134
    Harmon introduced Keith into the drug scheme, and
    both Harmon and Daily supplied Keith. Keith testified
    that from 2001 until 2004, he obtained at least one kilo-
    gram of cocaine a week from Harmon until Keith’s arrest
    in 2004. In 2002, Daily sold Keith six to seven grams of
    cocaine, which were provided by Harmon. Keith testified
    that, by the time of his arrest, he had received seventy
    kilograms of cocaine from Harmon and five from Daily.
    All of the cocaine involved in these transactions originated
    from Hernandez. In 2004, Keith obtained five kilograms of
    cocaine directly from Hernandez.
    Hernandez did not present any witnesses at the hearing,
    but during cross-examination of the government’s wit-
    nesses, his attorney elicited testimony indicating that they
    had made prior inconsistent statements to the agents
    investigating the case. Hernandez argued that the wit-
    nesses were biased because they were receiving benefits
    from the government in exchange for their testimony, and
    there were no drug ledgers or other records to corroborate
    their testimony. In response, the government contended
    that the witnesses established that Hernandez was respon-
    sible for distributing at least 196 kilograms of powder
    cocaine—eight kilograms in 2001; seventy-two kilograms
    in 2002; twenty-five kilograms in 2003; seventy-five
    kilograms in 2004; and sixteen kilograms in 2005. The
    district court ultimately concluded that Hernandez was
    responsible for distributing 159 kilograms of cocaine,
    which it considered a “conservative” estimate based on its
    consideration of the credibility of the witnesses. The court
    did not explain how it arrived at 159 kilograms, but did
    indicate that its decision was made beyond a reason-
    able doubt.
    No. 07-1134                                                5
    The finding of 159 kilograms resulted in Hernandez
    having a base offense level of 38. After applying a four-
    level enhancement for his leadership role in the offense
    and awarding a two-level reduction for acceptance of
    responsibility, the court determined that Hernandez had
    an offense level of 40. With a Criminal History Category of
    IV, the resulting advisory guidelines range was 360 months
    to life. The court sentenced Hernandez to 360 months
    in prison. Hernandez appeals, arguing that there was
    insufficient evidence to support the district court’s sen-
    tencing determination regarding drug quantity.
    II. ANALYSIS
    A. The district court did not commit clear error by
    crediting the testimony of the government’s wit-
    nesses at the sentencing hearing.
    We review the district court’s application of the sentenc-
    ing guidelines de novo and its factual findings under the
    clearly erroneous standard of review. United States v.
    Bennett, 
    461 F.3d 910
    , 912 (7th Cir. 2006). We will reverse
    the district court’s factual findings only where there is a
    “definite and firm conviction that a mistake has been
    committed.” Id.; United States v. Noble, 
    246 F.3d 946
    , 951
    (7th Cir. 2001). In determining a drug offender’s base
    offense level, a district court considers quantities of drugs
    specified in the count of conviction and the quantities
    that were part of the same course of conduct or common
    scheme or plan as the offense of conviction. See U.S.S.G.
    § 1B1.3(a)(2); United States v. Huerta, 
    239 F.3d 865
    , 875
    (7th Cir. 2001). In doing so, “the district court is entitled
    6                                               No. 07-1134
    to estimate drug quantity using testimony about the
    frequency of dealing and the amount dealt over a specified
    period of time.” Noble, 
    246 F.3d at 952
     (internal citations
    omitted).
    Hernandez disputes the drug quantity determination
    made by the district court, arguing that the witnesses
    who testified against him were not credible, and that the
    government failed to present any evidence to corroborate
    their testimony, such as ledgers or records memorializing
    the drug transactions. We have held, however, that
    “uncorroborated evidence can be a sufficient basis for a
    sentence.” United States v. Johnson, 
    227 F.3d 807
    , 813 (7th
    Cir. 2000). Hernandez’s arguments regarding witness
    credibility are also not persuasive. We are “reluctant to
    disturb credibility determinations absent a compelling
    reason,” Noble, 
    246 F.3d at 951
    , and here, no compelling
    reason exists. Hernandez focuses most of his efforts on
    undermining the credibility of Daily and Keith, whose
    testimony contained gaps and inconsistencies. Hernandez
    argues that Keith is unreliable because Keith testified that
    he named Hernandez as his supplier to the agents who
    arrested Keith, but Hernandez is never mentioned in
    the agents’ reports. Keith eventually told the agents that
    he had purchased cocaine directly from Hernandez, but
    it was two years after his initial arrest. This two year gap,
    Hernandez maintains, destroys Keith’s credibility.
    The omission of Hernandez from the agents’ reports,
    however, does not necessarily conflict with Keith’s later
    testimony that Hernandez was his supplier. Keith indi-
    cated on cross-examination that he did not mention
    No. 07-1134                                              7
    Hernandez because he was not asked about any of his
    transactions or dealings with Hernandez; additionally, he
    testified that he had discussed Hernandez on occasions
    that were not mentioned in the reports. Although Keith
    does not identify Hernandez as his supplier until two years
    after his arrest, Keith first mentioned Hernandez to the
    agents three weeks after Keith’s arrest. Keith mentioned to
    the agents that at one of his transactions with Harmon, he
    saw someone that he believed to be Harmon’s supplier,
    whom he referred to as “Javy,” which is Hernandez’s
    nickname. During this incident, Hernandez brought the
    cocaine to Harmon, who then sold it to Keith. From this
    perspective, the district court could have concluded that,
    despite the time gap, Keith’s testimony that he bought
    five kilograms directly from Hernandez is credible
    because Keith identified Hernandez as the supplier of
    the cocaine that he had purchased during his early trans-
    actions with Harmon. It would not be a stretch to believe
    that Keith later obtained cocaine from Hernandez directly.
    Hernandez also tried to discredit Harmon’s testimony
    that he received approximately seventy-two kilograms of
    cocaine indirectly through Hernandez in 2002 because
    Harmon testified that he never went with Daily to meet
    Hernandez to pick up the drugs. The fact that Harmon
    never went with Daily to get drugs from Hernandez does
    not mean that Hernandez did not supply Daily with the
    drugs that Harmon received. Harmon testified that
    “I would inform Darrell Daily that I needed a certain
    amount of—certain amount of kilos . . . and then I would
    meet up with him at his house and I would wait and then
    Javier would come in and then would leave, then I would
    8                                                   No. 07-1134
    have the amount that I was waiting for.” From this testi-
    mony, there is a strong inference that Hernandez was the
    source of the drugs that Daily provided to Harmon. In
    fact, Daily testified that in 2002 he received between one
    and twelve kilograms of cocaine from Hernandez on
    multiple occasions and seventeen kilograms on one
    occasion in particular, and Daily was Harmon’s supplier.
    Nonetheless, as Hernandez points out, there were
    inconsistencies in the testimony of the witnesses, particu-
    larly Daily. Discrepancies or inconsistent prior state-
    ments do not, as a matter of law, render a witness’s
    testimony incredible. United States v. Alcantar, 
    83 F.3d 185
    ,
    189-90 (7th Cir. 1996). “In order for testimony to be found
    incredible as a matter of law, ‘it must have been either
    physically impossible for the witness to observe that
    which he or she claims occurred, or impossible under
    the laws of nature for the occurrence to have taken place
    at all.’ ” United States v. Ortiz, 
    431 F.3d 1035
    , 1039 (7th Ci r.
    2005) (citing United States v. McEntire, 
    153 F.3d 424
    , 435 (7th
    Cir. 1998)).
    Here the testimony was neither impossible nor improba-
    ble, and in fact, the prosecutor tried to account for incon-
    sistencies in the witnesses’ testimony by excluding cer-
    tain amounts where appropriate. For example, Daily gave
    conflicting testimony about when he started receiving
    cocaine from a source other than Hernandez, so the
    government did not rely on Daily’s testimony in calculat-
    ing Hernandez’s drug quantity for the year 2003. Addition-
    ally, Daily testified that ninety percent of his supply
    came from Hernandez in 2002, leading the prosecutor to
    No. 07-1134                                               9
    proportionately discount the amount attributed to
    Hernandez for that year. Also, Harmon initially told
    authorities that he bought approximately twenty-five
    kilograms of cocaine directly from Hernandez in 2004,
    but later testified that he obtained fifty to seventy-five
    kilograms of cocaine. The prosecutor asked the court to
    hold Hernandez responsible for only twenty-five kilograms
    of cocaine, rather than fifty or seventy-five kilograms.
    Furthermore, the witnesses’ testimonies were fairly con-
    sistent with regards to the hierarchy of the drug operation;
    the business arrangement with the Morrises; and Keith’s
    introduction into the drug scheme. Daily and Harmon
    corroborated each other’s testimony in describing the
    formation of the drug operation in prison and their
    initial transaction with the Morrises. They also testified
    similarly as to the later transactions with the Morrises as
    well as the introduction of Keith, another of Harmon’s
    former prison mates, into the drug scheme. There was
    also overlap in testimony regarding the drug quanti-
    ties—for example, Daily testified that in 2001 and 2002,
    ninety percent of his supply of cocaine came from
    Hernandez, which was approximately eighty kilograms.
    Harmon’s testimony regarding his distributions to the
    Morrises was that during those years he sold them approx-
    imately eighty kilograms of cocaine, all of which were
    supplied by Daily. Thus, there is some indicia of reli-
    ability to the witnesses’ testimony which, when combined
    with their testimony about the frequency and amount of
    the drug dealing, could have reasonably led the district
    court to conclude that much of their testimony was credi-
    ble. Noble, 
    246 F.3d at 952
     (“The district court is entitled
    to estimate drug quantity using testimony about the
    10                                             No. 07-1134
    frequency of dealing and the amount dealt over a specified
    period of time”) (citing United States v. Durham, 
    211 F.3d 437
    , 444 (7th Cir. 2000)).
    Finally, Hernandez argues that because Daily, Harmon,
    and Powers are convicted felons, this fact in and of itself
    impeaches their credibility. This argument need not
    detain us long. While this is one factor that the district
    court can consider in weighing the evidence, it is also
    within the district court’s discretion to give some weight
    to their testimony, notwithstanding their status as felons.
    United States v. Johnson, 
    489 F.3d 794
    , 797 (7th Cir. 2007)
    (noting that the district court can credit testimony that
    is “totally uncorroborated and comes from an admitted
    liar, convicted felon, large scale drug-dealing, paid gov-
    ernment informant”). Accordingly, we find that the
    district court did not commit clear error in finding that
    the government’s witnesses were credible.
    B. The district court’s drug quantity calculation was
    clearly erroneous because the district court failed to
    specify how it determined the amount of drugs
    attributable to Hernandez.
    While the district court could conclude, based on the
    testimony at the sentencing hearing, that Hernandez
    conspired to distribute more than 150 kilograms of cocaine,
    it is unclear how it arrived at the 159 kilograms that it
    ultimately settled on as the drug quantity amount. The
    government agrees that, based on the testimony at the
    sentencing hearing, there is no way to arrive at 159 kilo-
    grams as the amount of cocaine attributable to Hernandez.
    No. 07-1134                                               11
    From the record, it is apparent that the district court
    weighed any perceived conflicts in the testimony, the
    witnesses’ felon status, and the imprecise nature of the
    drug calculations in reducing Hernandez’s drug quantity
    amount by almost forty kilograms from what the govern-
    ment asked it to consider in imposing sentence. Further,
    the district court indicated that its estimate was “conserva-
    tive,” suggesting that it believed that Hernandez was
    responsible for more drugs than it actually attributed
    to him.
    The district court’s failure to indicate how it arrived at
    its drug quantity calculation is problematic, however,
    because Hernandez’s base offense level of 40 corresponds
    to a drug quantity amount of 150 kilograms or more of
    cocaine; the court settled on 159 kilograms, which is
    extremely close to the cutoff of 150 kilograms. See U.S.S.G.
    § 2D1.1. Had it reduced the drug quantity finding by an
    additional nine kilograms, the base offense level would
    have been 36 (the range for 50 to 150 kilograms of cocaine)
    which, with the four-level enhancement for leadership
    role in an offense and two-level reduction for acceptance
    of responsibility, would have been a base offense level of
    38. Given Hernandez’s Criminal History Category of IV,
    the advisory guidelines range would be 262-327 months,
    rather than the range of 360 months to life used by the
    district court. See U.S.S.G. § 5A.
    It is clear that in Hernandez’s situation, where the
    district court’s drug quantity calculation placed him on
    the cusp of a lower guidelines range, every kilogram
    counts. In particular, Daily’s testimony leaves the most
    12                                                No. 07-1134
    room for error. While the government discounted much of
    Daily’s testimony in calculating its drug quantity recom-
    mendation, it is not clear what portions of Daily’s testi-
    mony the district court credited in determining the drug
    quantity amount attributable to Hernandez. Daily testified
    that he started buying cocaine from a supplier other
    than Hernandez in 2002 because of the incident with
    the “bad kilo,” but Daily’s proffer statement, which
    was used to refresh his recollection at the sentencing,
    indicated that Daily first started buying cocaine from
    the alternate source in May of 2003. While the govern-
    ment did not include any of Hernandez’s sales to Daily
    in 2003 in its drug quantity calculation because of this
    discrepancy, it is not clear if the district court also reduced
    the drug quantity amount for 2002 based on Daily’s
    conflicting testimony that he purchased drugs from an
    individual other than Hernandez that year.
    In addition, Daily initially testified that approximately
    ninety percent of the cocaine that he sold to the Morrises
    from 2001 until 2003, either directly or through Harmon,
    was provided by Hernandez, but later changed his testi-
    mony to suggest that the ninety percent figure might not
    be entirely correct and that Hernandez might not have
    been Daily’s primary source. This testimony suggests that
    Hernandez’s drug sales to Daily may have been less than
    the amount of drugs that the government sought to
    attribute to Hernandez from 2001 until 2003.
    In contrast, Harmon’s testimony indicates that
    Hernandez might be responsible for more than the drug
    quantity that the government attributed to Hernandez
    No. 07-1134                                                 13
    for the year 2002. For example, Harmon testified that
    there was at least one instance in 2002 were he provided
    eight kilograms of cocaine to the Morrises. In calculating
    drug quantity for 2002, the prosecutor did not include
    this figure, opting instead to rely on Harmon’s testimony
    that he provided at least six kilograms to the Morrises
    every month in 2002. The prosecutor also relied on the
    lower estimate regarding the drugs that Hernandez sold
    to Harmon in 2004, relying on the figure of twenty-five
    kilograms because of discrepancies in Harmon’s testimony,
    even though Harmon testified that he was obtaining, on
    average, ten kilograms a month from Hernandez during
    that year, and at one point, had obtained eighteen kilo-
    grams of cocaine from Hernandez to sell to the Morrises.
    While the prosecutor’s reliance on the lower drug
    amount is certainly not problematic, these discrepancies
    illustrate the need for specificity by the district court as to
    what testimony it relied on in calculating the 159 kilograms
    it ultimately held Hernandez responsible for, especially
    given this amount’s proximity to the cutoff for the
    lower base offense level, which corresponds to a drug
    quantity amount of 50-150 kilograms of cocaine.
    We have long recognized that the drug quantity calcula-
    tion is necessarily imprecise because “drug dealers ordi-
    narily do not use invoices and bills of lading”; therefore,
    “sentencing courts may make reasonable estimates as to
    drug quantities.” United States v. Rodriguez, 
    67 F.3d 1312
    ,
    1325 (7th Cir. 1995). Here, the district court’s determina-
    tion that Hernandez was responsible for 159 kilograms
    might be a “conservative” estimate given that the gov-
    ernment asked it to attribute a drug quantity of 196
    14                                                 No. 07-1134
    kilograms to Hernandez. We also know that the district
    court did not count eighteen kilograms of cocaine that
    Hernandez supplied to Powers through a third party after
    his arrest. Although the district court reduced the drug
    quantity calculation recommended by the government
    by almost forty kilograms because of the various con-
    tradictions and inconsistencies present in the witnesses’
    testimony, the district court does not indicate which
    amounts it actually relied on in calculating the 159 kilo-
    grams that it ultimately attributed to Hernandez. Given
    the various amounts mentioned during the testimony at
    sentencing and the fact that the district court did not
    explain how it determined its drug quantity calculation,
    it is impossible for us to find that there was no error in
    the calculation.
    C. The parties can stipulate to a different burden of
    proof than that required by law, but we cannot
    determine from the record if the government met
    its burden.
    In the plea agreement, the parties stipulated that the
    government has the burden of proving the quantity of
    drugs attributable to Hernandez beyond a reasonable
    doubt at sentencing.1 Usually, the district court makes
    1
    The defendant also argues that the district court should have
    adhered to the Federal Rules of Evidence at his sentencing
    hearing because the parties agreed to a higher burden of proof.
    The defendant offers no authority for this position and the
    (continued...)
    No. 07-1134                                                 15
    drug quantity findings at sentencing based on the prepon-
    derance standard. United States v. Spiller, 
    261 F.3d 683
    , 691
    (7th Cir. 2001) (“[A]t sentencing, the Government must
    prove the facts underlying the base offense or an enhance-
    ment by a preponderance of the evidence.”) (internal
    citation and quotation omitted). Nevertheless, the district
    court stated that it made its findings consistent with the
    standard agreed on by the parties because it assumed it
    was bound by the stipulation. As a general matter, we do
    not subscribe to the idea that the court was bound by the
    parties’ stipulation. United States v. Mankiewicz, 
    122 F.3d 399
    , 403 n.1 (7th Cir. 1997) (“As the Guidelines themselves
    make clear, although the plea agreement binds the parties,
    it does not bind the court.”); see also U.S.S.G. § 6B1.4(d)
    (stating that parties can stipulate to facts relevant to
    sentencing as a part of a plea agreement, but the court is
    not obligated to accept the stipulation).
    In fact, a district court can reject a plea agreement in
    its entirety as long as the court “articulates a sound reason
    for rejecting the agreement.” United States v. King, 
    506 F.3d 532
    , 535 (7th Cir. 2007) (affirming the district court’s
    rejection of a plea agreement on the basis that the sen-
    tence within the parties’ proposed guidelines range
    would have been too low to achieve the sentencing goals
    enumerated in 
    18 U.S.C. § 3553
    (a)); see also Fed. R. Crim. P.
    11(c)(5) (discussing circumstances in which a district
    1
    (...continued)
    parties did not explicitly agree to such an arrangement. There-
    fore, we will not read new terms into the plea agreement.
    16                                                 No. 07-1134
    court can reject a plea agreement). This is particularly
    true here where the parties have stipulated, not to specific
    facts, but to a different standard for the applicable burden
    of proof at sentencing. See Swift & Co. v. Hocking Valley R.
    Co., 
    243 U.S. 281
    , 290 (1917) (“the court cannot be con-
    trolled by agreement of counsel on a subsidiary question
    of law”); United States v. One 1978 Bell Jet Ranger Helicopter,
    
    707 F.2d 461
    , 462 (11th Cir. 1983) (“a stipulation of the
    parties to an action may be ignored by the court if it is a
    stipulation as to what the law requires”); King v. United
    States, 
    641 F.2d 253
    , 258 (5th Cir. 1981) (same).
    However, where a court opts to enforce a plea agree-
    ment, it should adhere to the terms agreed upon by the
    parties. Plea agreements are contracts, and should be
    interpreted according to principles of contract law. United
    States v. Randle, 
    324 F.3d 550
    , 557-58 (7th Cir. 2003) (citing
    United States v. Williams, 
    102 F.3d 923
    , 926-27 (7th Cir.
    1996)). Like other contracts, plea agreements should be
    enforced consistent with the intent of the parties and the
    language of the agreement. United States v. Atkinson, 
    259 F.3d 648
    , 654 (7th Cir. 2001) (“[W]e review the language
    of the plea agreement objectively and hold the govern-
    ment to the literal terms of the plea agreement.”) (citation
    omitted).
    The district court opted to enforce the stipulation.
    Initially, we note that there does not appear to be any harm
    from its decision to do so.2 Unlike a situation in which a
    2
    Although neither side challenges the validity of the stipula-
    tion, where the parties have changed the burden of proof
    (continued...)
    No. 07-1134                                                   17
    defendant has waived one of his rights as a part of a
    constitutionally impermissible plea agreement, or where
    the parties have stipulated to some unorthodox practice,
    the same concerns are not present here. See United States v.
    Hicks, 
    129 F.3d 376
    , 377 (7th Cir. 1997) (“a sentence based
    on constitutionally impermissible criteria, such as race,
    is invalid even though the defendant executed a blanket
    waiver of his rights”); United States v. Feichtinger, 
    105 F.3d 1188
    , 1190 (7th Cir. 1997) (a sentence in excess of the
    statutory maximum sentence for the defendant’s crime
    invalidates sentence, notwithstanding defendant’s stipula-
    tion waiving his right to appeal); United States v. Andrews,
    
    895 F.2d 406
    , 409 (7th Cir. 1990) (where the defendant
    waived his right to have a trial declared a mistrial after
    extrinsic evidence was submitted to the jury, “what is
    important to our inquiry is that the trial court’s acceptance
    of this waiver was not so offensive to our concept of
    ordered liberty so as to shock our conscience”); United
    States v. Josefik, 
    753 F.2d 585
    , 588 (7th Cir. 1985) (finding
    that limitations exist on the ability of parties to stipulate
    to the structure of the jury at trial because “if the parties
    stipulated to trial by 12 orangutans the defendant’s
    2
    (...continued)
    through their plea agreement, it is within the realm of our
    authority to question, sua sponte, the propriety of doing so. See
    Kamen v. Kemper Fin. Servs., 
    500 U.S. 90
    , 99 (1991) (“When an
    issue or claim is properly before the court, the court is not
    limited to the particular legal theories advanced by the
    parties, but rather retains the independent power to identify
    and apply the proper construction of governing law.”)
    18                                             No. 07-1134
    conviction would be invalid notwithstanding his consent,
    because some minimum of civilized procedure is re-
    quired by community feeling regardless of what the
    defendant wants or is willing to accept.”).
    Most notably, none of the defendant’s constitutional
    rights are infringed by the stipulation and the standard
    chosen by the parties is one with which the district court
    is familiar. Furthermore, the sentencing hearing was
    conducted in a manner that did not substantially deviate
    from statutory or constitutional norms, and neither
    party has contested the stipulation on appeal. Had any
    of these factors not been present, the stipulation might be
    invalid.
    The problem is that we cannot determine if the district
    court calculated the amounts of drugs attributable to
    Hernandez using the reasonable doubt standard. The court
    did not explain how it arrived at 159 kilograms as the
    drug quantity amount; thus, it is not clear from the
    record if the district court acted in accordance with the
    stipulation, as it purported to do.
    III. CONCLUSION
    Accordingly, we R EVERSE and R EMAND this case for
    proceedings consistent with this opinion.
    9-12-08