While on supervised release for drug and firearms charges, Gary John Cates tested positive on three separate occasions for marijuana use. The district court 1 revoked Cates’s supervised release and sentenced him to 11 months imprisonment and 3 years supervised release. Cates appeals his revocation sentence, and we affirm.
I. BACKGROUND
In August 1997, Cates pled guilty to (1) being a felon in possession of a firearm, (2) possession of a sawed-off shotgun, (3) distribution of methamphetamine, and (4) conspiracy to distribute methamphetamine. Cates was sentenced to concurrent terms of 144 months and 120 months imprisonment followed by 4 years of supervised release. Cates began serving his term of supervised release in January 2008. In April, May, and June 2009, Cates tested positive for marijuana use. In July 2009, Cates’s probation officer filed a petition to revoke Cates’s supervised release, and Cates was summoned to appear before the district court. On the morning of the revocation hearing, Cates tested presumptively positive for marijuana, 2 causing the district court to continue the hearing to September 2009.
A week before the second hearing, and on the day of the hearing, Cates again tested presumptively positive for marijuana. At the hearing, Cates admitted he used marijuana twice in early April 2009. Cates, who has cancer, testified his oncologist told him “they were using marijuana, experimenting with marijuana” to alleviate the pain associated with cancer. Cates mentioned this to a friend who came to visit in April 2009, and the friend happened to have marijuana in his possession. Cates contends he smoked the marijuana with his friend, and again the next day with his friend’s son, to alleviate his cancer-related pain. Cates denied he “deliberately” or “knowingly” used marijuana after April 2009. Cates testified he smoked a pipe every morning as part of a Native American religious ritual. Cates claimed he had borrowed a pipe from his son in March, and later learned his son’s roommates had used the pipe to smoke marijuana. Cates suggested this may explain why he was testing positive for marijuana. Cates reported he had not used the pipe in over a month.
The district court did not believe Cates’s explanation for the positive marijuana tests and determined Cates possessed the marijuana which constituted a grade A violation of supervised release. Because Cates was on supervised release for a class A felony and had a criminal history catego
Cates appeals his revocation sentence, arguing the district court erred in (1) discrediting Cates’s explanation for the positive marijuana tests, (2) improperly weighing the 18 U.S.C. § 3553(a) factors, (3) inadequately explaining Cates’s sentence, and (4) imposing an unreasonable sentence.
II. DISCUSSION
“We review a district court’s revocation sentencing decisions using the same standards that we apply to initial sentencing decisions,” that is, abuse of discretion.
United States v. Miller,
In reviewing for abuse of discretion, we must first ensure that the court committed no significant procedural error, such as improperly calculating the sentence under the Guidelines, failing to consider relevant 18 U.S.C. § 3553(a) sentencing factors, imposing a sentence based on clearly erroneous facts, or failing to adequately explain the reasons for the sentence imposed.
Id.
(citing
Gall v. United States,
A. Credibility Determination
Cates first contends the district court erred in disbelieving Cates’s explanation for the positive marijuana tests. Cates suggests the district court’s credibility determination was based on speculation and factual error. The district court found Cates’s explanation was “unpersuasive and just an excuse” because Cates had used marijuana on and off for several years “and he would certainly be able to feel the effects of marijuana if he smoked.” The district court also expressed doubt Cates would not have tested positive for marijuana until April if he started using the allegedly marijuana tainted pipe in March. The district court declared, “That makes no sense. I don’t believe it.”
“Witness credibility is quintessentially a judgment call and virtually unassailable on appeal.”
United States v. Bolden,
B. Procedural Error
Before we address Cates’s substantive reasonableness argument, we must first address the district court’s Guidelines calculations. Cates asserts, and the government concedes, the district court procedurally erred in finding Cates’s possession of marijuana was a grade A violation of supervised release. Under U.S.S.G. § 7Bl.l(a)(l), controlled substance of
Cates also contends the district court proeedurally erred by improperly weighing the 18 U.S.C. § 3553(a) factors and inadequately explaining the basis of its sentence. Because Cates did not raise these objections in the district court, we review for plain error.
See Miller,
C. Substantive Reasonableness
Finally, Cates contends the district court imposed a substantively unreasonable sentence. Cates had prior drug convictions, making his April 2009 drug possession offense a felony.
See
21 U.S.C. § 844(a). Therefore, Cates committed a grade B violation, and his advisory Guidelines range was 21 to 27 months imprisonment.
See
U.S.S.G. §§ 7Bl.l(a)(2) and 7B1.4(a). “[G]iv[ing] due deference to the district court’s decision that the § 3553(a) factors, on a whole, justify” Cates’s sentence,
Gall,
III. CONCLUSION
We affirm the district court’s judgment.
Notes
. The Honorable Linda R. Reade, Chief Judge, United States District Court for the Northern District of Iowa.
. Cates’s urine sample was sent to a laboratory for further testing. The laboratory reported Cates tested negative for marijuana. The probation officer suggested the discrepancy was due to the laboratory reporting negative results when the level of marijuana fell below fifteen nanograms per milliliter, and the probation office uses a lower cutoff level.
