Marvin Banks had already done two stints in state prison and faced an unserved indictment on drug charges when a Hattiesburg police officer pulled his girlfriend over for speeding just after sundown Saturday.

But instead of escaping the possibility of more prison time, the 26-year-old Banks is now jailed without bond on two capital murder charges. Authorities say he fatally shot Officers Benjamin Deen in the face and Liquori Tate in the back.

Murder charges against girlfriend Joanie Calloway were decreased Monday to an accessory, meaning authorities believe Banks was the triggerman.

Banks' brother, Curtis Banks, is charged as an accessory. His bond on a previous drug charge was revoked, meaning he'll likely stay jailed.

Banks' friend Cornelius Clark is also charged with obstruction.