Federal charges have been filed against a 25-year-old man accused of possessing a firearm in Douglas County after a felony conviction, prosecutors announced Wednesday morning.

Patrick Walker is accused of possessing the firearm on May 3, 2008, U.S. Attorney Eric Melgren’s office said. If convicted, Walker faces a maximum penalty of 10 years in federal prison and a fine up to $250,000, said Jim Cross, spokesman for Melgren.

Lawrence police investigated the case.