A Casper teen pleaded not guilty Thursday morning to charges alleging he stole a law enforcement rifle from a parked car.

Brendon Brimmer, 18, faces a set of felonies alleging that earlier this year he and two younger teens conspired to burglarize weapons from parked vehicles. Prosecutors say the teens stole a deputy’s AR-15 and a pair of ballistic vests from a parked Natrona County sheriff’s vehicle.

In Natrona County District Court on Thursday, Brimmer appeared wearing handcuffs and orange apparel indicating he’s being held in Natrona County Detention Center custody in advance of trial. During the brief arraignment, Judge Catherine Wilking agreed to reduce Brimmer’s bail to $20,000 and allow him to hire a bail bond agent.

A circuit court judge had previously set Brimmer’s bond at $25,000 cash-only.

Last month, a sheriff’s spokesman said the deputy left the gun in a department vehicle that is used for traveling long distances and — unlike patrol trucks — does not have a compartment secured to store weapons. The spokesman said the deputy made a mistake and it had “been addressed,” but he did not specify the nature of the discipline.

Police began investigating the case on April 24, the same day a series of reports of weapon thefts were made, according to court documents. The next day, police arrested Bimmer and recovered the rifle, body armor and two pistols that authorities say were taken from private citizens’ vehicles. Court documents state the weapons were found in the younger teens’ homes.

Prosecutors have charged one of the two other alleged conspirators in juvenile proceedings, Assistant District Attorney Mike Schafer told the Star-Tribune last month. He has since said that prosecutors will likely not charge the second juvenile. He could not say which of the two younger teens was charged.

Wyoming law closes juvenile proceedings to the public. The identities of the teens and the nature of the charge are therefore not available in public court records. The outcome of the juvenile case will also not be made public.

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Crime and Courts Reporter

Shane Sanderson is a Star-Tribune reporter who primarily covers criminal justice. Sanderson is a proud University of Missouri graduate. Lately, he’s been reading Cormac McCarthy and cooking Italian food. He writes about his own life in his free time.

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