Several individuals were recently sentenced in the District of Wyoming for federal firearm, drug, and immigration offenses, according to announcements from the U.S. Attorney’s Office.
Milton Robert Petersen, 55, of Pavillion, received a sentence of 70 months in prison and three years of supervised release for being a felon in possession of firearms. Court documents state that on March 13, 2025, law enforcement found Petersen with two rifles inside a camper trailer during a search at his residence. Officers seized approximately 57 firearms from the property. Petersen admitted to having numerous firearms despite multiple felony convictions prohibiting him from possessing them. The investigation was conducted by the Wyoming Division of Criminal Investigation and the FBI Rocky Mountain Safe Trails Task Force. Assistant U.S. Attorney Timothy W. Gist prosecuted the case. U.S. District Court Judge Alan B. Johnson imposed the sentence on January 21 in Cheyenne.
Robert Dean Campbell, 50, of Cheyenne, was sentenced to 18 months in prison and two years of supervised release for being a felon in possession of a firearm. According to court records, Campbell had previously been convicted in 2009 for possessing a firearm related to drug trafficking and later violated his supervised release before absconding supervision in 2021. On August 15, 2024, he was located by the U.S. Marshals Service at his girlfriend’s camper where officers found him with a Ruger 9mm pistol. The Cheyenne Police Department assisted with the investigation; Assistant U.S. Attorney Paige Hammer prosecuted the case; Chief U.S. District Judge Kelly H. Rankin imposed sentencing on January 30.
Jason Arnold Rohrich, 49, of Rapid City (South Dakota), received sentences stemming from two separate cases involving drugs and firearms charges: one for being a felon in possession of a firearm (135 months’ imprisonment with three years’ supervised release) and another for possession with intent to distribute methamphetamine (180 months’ imprisonment with ten years’ supervised release). Both sentences will run concurrently as determined by U.S. District Court Judge Alan B. Johnson on January 23 in Cheyenne.
Court documents show that Rohrich was stopped by Wyoming Highway Patrol on September 11, 2024; troopers discovered methamphetamine and cash during their search along with a semi-automatic pistol hidden among secret compartments inside stainless steel cups after assistance from the Uinta County Sheriff’s Office.
In an additional incident detailed under Case No. 25-CR-00145: On October 3rd of that year Idaho State Police stopped Rohrich who displayed signs consistent with intoxication; after arresting him they found several pounds of methamphetamine behind his seat as well as small baggies near both drugs and a .45 caliber Glock handgun—Bonneville County Sheriff’s Office K9 unit participated in this search effort.
Assistant U.S Attorneys Christyne M Martens prosecuted these cases while Rohrich pleaded guilty on October 21st after indictments issued January 28th.
Tyler L Riser (32) Riverton WY was sentenced over three criminal counts: distribution/conspiracy-to-distribute methamphetamine plus consecutive five-year term (60 months) for possessing firearms linked directly to drug trafficking activity—five years' concurrent supervised release per count also imposed following investigation into Wind River Indian Reservation narcotics activity by DCI agents who arrested Riser February 25th last year after executing warrant at home seizing seven guns ammunition $2k+ cash approx twenty-one grams packaged meth paraphernalia—case handled by AUSA Timothy W Gist sentenced Jan 28 Casper before USDC Judge Scott W Skavdahl
Juan Pedro Rangel-Ventura (25) Jalisco Mexico received time served plus ten days pending deportation proceedings following conviction illegal re-entry previously deported alien; ICE located defendant Sublette County Jail June 15th using fingerprints confirming prior removal November 2022 without permission re-enter prosecution led Cameron J Cook sentence rendered Chief USDC Judge Kelly H Rankin Jan 20 Cheyenne
The United States Attorney’s Office represents federal interests throughout Wyoming including all criminal prosecutions civil litigation collection efforts restitution actions designed support victims taxpayers—it also participates community safety initiatives such as Project Safe Childhood aimed combating child exploitation crimes Operation Take Back America focused countering illegal immigration organized crime cartel violence streamlining DOJ task force resources alongside Victim Witness Program ensuring compassion fairness respect afforded crime victims families.
