Published: Jul 22, 2010 5:20 PM EDT
Updated: Jul 22, 2010 2:20 PM EDT

TAMPA, Fla. (AP) - The FBI is offering $20,000 for information leading to the recovery of the handgun used to kill two police officers and a third victim.

FBI agents in Tampa said Thursday that the same gun, using .38-caliber bullets, was used in the June 29 fatal shootings of police Officers David Curtis and Jeffrey Kocab and the May 18 killing of 21-year-old Derek Anderson.

Dontae Morris has been arrested in connection with the three homicides. He pleaded not guilty Thursday to first-degree murder.

The FBI asks anyone with information about the weapon to contact the Tampa FBI office at (813) 253-1000. Tips can be anonymous.