United States Court of Appeals
                         FOR THE EIGHTH CIRCUIT
                                ___________

                                No. 05-1211
                                ___________

Mosheh Malik Louis, also known           *
as Harry James Starks; Dearle            *
Alexander, Jr.; David Allen; Billy       *
Billups; Dennis S. Black; Donald L.      *
Boggess; Rickey E. Bringus; Manuel J.    *
Cabrera; George E. Carter; Vincent A.    *
Carter; Trentelle A. Clifton; William    *
Ray Cole; Anthony W. Coleman;            *
Gerry D. Crawford; Carey G.              *
Creelman; Eric L. Crudup; Ricky R.       *
Davenport; Jaron Dean; Nuha Refid;       *
Michael Fonville; Ronald N. Fort;        *
Jerome J. Gilmore; Lester L. Glantz;     *   Appeal from the United States
Andre M. Gomez; David A. Graves;         *   District Court for the
Larry D. Hardin; Marc Herrera, also      *   District of Nebraska.
known as Anthony Herrera; Larry D.       *
James; Marvel Jones; Vincent             *
Jones, Jr.; Elijah Jones; Leonard        *
Jordan; John L. Lewis, also known as     *
Rod Frazier; Reko Mitchell; Elezar       *
Moreno; Charles Overguard; Robert W.     *
 Parker; Donald Patz, also known as      *
Donald Scott; Leroy Parmer; Stanley A.   *
Poe; Corey J. Prater; Kenneth N.         *
Rhodes; Samuel L. Sanders; Larry B.      *
Scott; Lord Shabazz; Tyrus T. Shelly;    *
John D. Shemat; Larcell L. Starks;       *
Robert Venable; Robert Dean Wiese;       *
Fred White; Martize A. Williams;       *
Harvey Cass,                           *
                                       *
              Appellants,              *
                                       *
       v.                              *
                                       *
Department of Correctional Services    *
of Nebraska; Harold W. Clarke; Frank *
Hopkins; Mike Kenny; Teresa            *
Predmore; Dallen E. Johnson; Pamela *
Hillman; Susan Phinney; Kelly          *
Wubbels; Mark Danner; Matthew          *
Hinrichs; Scott Marshall; Michelle     *
Rose-Seeman; Brad Exstrom; Randy       *
Crosby; Joseph Posposol; Scott         *
Isherwood; Todd Haussler; Ronald       *
Bailey; Douglas Diltz; Karen Foster;   *
Michael Edison; George Green;          *
Claude R. Rinke; James Pierce; Brad    *
Hausen; Robert Treptow; Daniel T.      *
Higgins; Larry Stroud; Linda Leonard; *
Matthew Galvin; Robert Madsen;         *
Daniel Schumaucher; Richard            *
Brittenham; Melvin Rouf; Barry W.      *
Loock; Diane Sabatka; Dennis Colyer; *
Ronald L. Petersen; Unknown Cockrell, *
in their individual and official       *
capacities,                            *
                                       *
              Appellees.               *
                                  ___________

                           Submitted: November 14, 2005
                              Filed: February 3, 2006
                               ___________

Before ARNOLD, BEAM, and RILEY, Circuit Judges.
                           ___________

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ARNOLD, Circuit Judge.

       Inmates and former inmates of the Nebraska Department of Correctional
Services (DCS) appeal the judgment of the district court1 denying their claim that
DCS's method of collecting and testing urine samples for drug use violated their
constitutional right to procedural due process. We affirm.

                                           I.
       This suit arises out of a program to eradicate drug use in the Nebraska State
Penitentiary (NSP). The program requires inmates to provide urine samples to be
tested for drug use. The samples are collected by correctional officers or case
workers and submitted to a laboratory adjacent to the NSP hospital. The collector
takes a sealed cup, shows it to the inmate, breaks the seal, and labels the cup with the
inmate's correct name and number. The inmate then urinates in the cup in the
presence of the collector and returns the cup to the collector. After the sample has
been tested for specific gravity, the collector places a form reflecting receipt of the
urine sample in an evidence box and takes the sample cup and its corresponding
evidence card, which is used to record the chain of custody, to the NSP hospital,
where the sample is refrigerated pending lab testing.

      Trained laboratory technicians then test the urine using the fluorescence
polarization immunoassay (FPIA) method. According to Dr. David Black, an expert
witness testifying for the defendants, the FPIA test is approximately ninety-five
percent accurate. If FPIA testing indicates that an inmate's sample contains drug
metabolites, the technician reruns it. If a second such test confirms the presence of
drugs and the inmate's medical records do not reflect the use of prescribed
medications that could provide a false-positive result, the technician sends the
specimen report and the evidence card to the prison disciplinary board. Nebraska law
allows an inmate to request an independent test of his urine sample. That test is

      1
      The Honorable Richard G. Kopf, United States District Judge for the District
of Nebraska.

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performed in a private laboratory using gas chromatography/mass spectrometry
(GC/MS). GC/MS testing is more accurate and more expensive than the FPIA
method and typically costs $30, although it can cost as much as $90, depending on
the drug at issue. The inmate pays the cost of confirmatory GC/MS testing if the
sample tests positive for drug metabolites. If a disciplinary complaint is filed against
an inmate, a hearing before the disciplinary committee follows. While the inmate
may call witnesses at this hearing, he may not call the laboratory technician who
carried out the FPIA test. Instead, the technician provides a written statement of the
procedures used in the lab.

        The plaintiffs filed a complaint against NSP and prison officials under
42 U.S.C. § 1983, claiming that the drug-testing procedures followed at NSP violate
their right to procedural due process because they impose a risk that inmates will be
wrongfully deprived of good-time credits or placed in disciplinary segregation. We
agree with the district court that NSP's procedures adequately protect the inmates' due
process rights.

                                           II.
       We assess the constitutionality of the procedures used to collect and analyze
the inmates' urine samples by balancing the competing interests in play: "the private
interest that will be affected by the official action; ... the risk of an erroneous
deprivation of such interest through the procedures used, and the probable value, if
any, of additional or substitute procedural safeguards; and finally, the Government's
interest, including the function involved and the fiscal and administrative burdens that
the additional or substitute procedural requirement would entail." Mathews v.
Eldridge, 

, 334-35 (1976).

       The inmates possess a protected liberty interest in not being arbitrarily deprived
of their good-time credits, and thus NSP must observe due process when the credits
are in issue. See Wolff v. McDonnell, 

, 556-58 (1974). Although due
process rights are limited in the prison disciplinary context, they require, inter alia,

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that good-time credits may be revoked only if the revocation is supported by "some
evidence in the record." But due process requirements "are flexible and depend on a
balancing of the interests affected by the relevant government action."
Superintendent v. Hill, 

, 454 (1985). Here, the prison has an interest in
reducing drug use by inmates, but there are practical limits on how much money it
can spend.

       The plaintiffs first maintain that due process requires that the collection
procedures be altered to allow the inmate himself to sign and seal the specimen after
the prison collects it. The plaintiffs, however, offered no evidence that the current
training and collection protocols have resulted in erroneous deprivations of good-time
credits. The alterations in collection procedures that the plaintiffs request are small
and would contribute only marginally to the accuracy of the test results, and the
prison would incur costs for retraining if it changed the protocol. While the
collection procedures may not be maximally drawn to eliminate mislabeled samples,
they conform to practices used in private-sector workplace testing and are adequate
to ensure reasonably reliable results. The Supreme Court has said that "federal courts
ought to afford appropriate deference and flexibility to state [prison] officials trying
to manage a volatile environment." Sandin v. Conner, 

, 482 (1995).
NSP officials have chosen to collect urine samples for drug testing in a particular
manner, and absent evidence that this decision resulted in an unreasonable risk of
inmates being deprived of good-time credits, we defer to their choice.

        The inmates also argue that due process requires that the state conduct a
GC/MS test on samples that test positive for drugs if the inmate does not admit to
drug use when confronted. The contention is that NSP's refusal to fund confirmatory
GC/MS testing after FPIA testing yields a positive result and the inmate denies using
illicit drugs violates due process because GC/MS testing is not burdensome and
unwarranted and would minimize errors. We have previously held that "[s]tates need
not implement all possible procedural safeguards against erroneous deprivation of
liberty when utilizing results of scientific testing devices in accusatory proceedings."

                                          -5-
Spence v. Farrier, 

, 756 (8th Cir. 1986). In Spence, we rejected a due
process challenge to a regime that allowed test results into evidence at prison
disciplinary proceedings after urine samples were twice tested using a method that
was ninety-five percent accurate. 

see also Harmon v. Auger, 

, 276 (8th Cir. 1985). The inmates in 

, were not permitted
to have confirmatory testing done by another method or to call expert witnesses at the
disciplinary hearing. The FPIA test used here is ninety-five percent accurate, and a
sample registering drug metabolites is subjected to a second FPIA test for
confirmation before it is definitively considered to have registered positive for illicit
drug use. And, as we have said, under the Nebraska system inmates may obtain
confirmatory testing at an independent laboratory, see Neb. Rev. Stat. § 83-4,114.02,
and are required to pay for the GC/MS test only in the event that this test yields a
positive result for drug metabolites. The Nebraska regime thus provides more
procedural safeguards than the one that we approved in Spence. We therefore discern
no constitutional infirmity in the arrangement challenged here.

       Plaintiffs' final constitutional argument is that due process requires the
admission at inmate disciplinary hearings of testimony from the technician who tested
a urine sample, or test-specific documentation on how the technician processed the
particular sample, before an inmate can be found guilty of a drug infraction. But we
believe that NSP's refusal to permit inmates to call lab technicians as witnesses is
justified by the need to manage the environment of a prison and to maximize the
productivity of the lab technicians in its employ. We have upheld the admission of
urinalysis laboratory reports at a parole hearing, finding that the reports bore
"substantial indicia of reliability" and that the confrontation clause did not require the
out-of-state chemist who performed the test to appear. See United States v. Bell,

, 643 (8th Cir. 1986). Here the unsworn statements provided to inmates
subject to a disciplinary hearing for drug use outline the procedures used at the testing
facility and the qualifications of the laboratory supervisor. Since we have previously
held that prison disciplinary hearings that did not include expert testimony did not



                                           -6-
violate due process, see 

, we uphold NSP's restriction on
evidentiary material in its disciplinary hearings.

                                           II.
        The plaintiffs also contend that the district court abused its discretion by not
prohibiting the defendants from using certain exhibits at trial. The defendants stated
that they did not produce the exhibits in question, a collection of revised rules
regulating the urine-sample collection and analysis protocols, until a few days before
trial because defense counsel took maternity leave and had a busy schedule when she
returned. The plaintiffs moved to exclude the exhibits from evidence, but the district
judge instead ruled that if the evidence adduced at trial indicated that the exhibits
were withheld for tactical reasons, the fact-finder could draw an adverse inference
from the tardy production. At trial, the district court found that while the reasons that
the defendants proffered for the untimely production of the new rules did not furnish
a complete excuse, there was no evidence that the exhibits were withheld in bad faith;
in addition, the court concluded that the plaintiffs were not prejudiced by the delay
in production. We do not believe that the district court abused its discretion by
imposing a conditional sanction or by ultimately admitting the exhibits.

                                        III.
      For the reasons indicated, we affirm.
                           ______________________




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