WICHITA, Kan. (AP) — A federal judge has dropped all charges against a former Bel Aire police officer accused in a scheme to buy and sell discounted firearms by falsely claiming they would be used for law enforcement purposes.

U.S. District Judge Eric Melgren dismissed on Thursday at the government’s request mail and wire fraud charges against Nathan Mavia just weeks before his trial.

Mavia had been employed at the department from February 2012 until June 2014.

Court filings do not indicate why prosecutors asked the court to throw out his charges. Neither the U.S. attorney’s office nor his defense attorney immediately returned messages seeking comment.

Former Bel Aire Police Chief John Daily and two of his ex-officers, Robert McCaslin and Ricky Swanson, face trial on Feb. 16 in U.S. District Court in Wichita.