A U.S. Marine Corps reservist admitted in federal court Friday that he stole more than $56,000 worth of cartridge cases and ammunition cans from the training base at Quantico and sold them for scrap, court records show.

Alroy Anthony Simmonds, 35, of Stafford, Va., admitted as part of an agreement with prosecutors that he sometimes cut through the fences of the lots where the spent brass cases and steel cans were stored, and other times wore his Marine uniform and collected the items at live fire ranges. He then sold the metal for scrap at a Springfield, Va., recycling company, and pocketed the profits, court records show.

Simmonds also admitted as part of his plea that he offered to bribe an employee of that recycling company, Potomac Metals Incorporated, to lie at a trial. The employee had asked Simmonds where he got the cartridges and ammunition cans, and Simmonds told him he had the authority to sell it on behalf of the base at Quantico, according to the plea.

Simmonds is a sergeant in the U.S. Marine Corps Inactive Ready Reserve and would occasionally work on active duty for units assigned to Quantico, though he was not doing so when the thefts occurred, according to the plea. He pleaded guilty to theft of government property and tampering with a witness, court records show.

Robert Deaderick, Simmonds’s defense attorney, declined to comment. Simmonds is scheduled to be sentenced July 18, court records show.

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