Mississippi Gov. Phil Bryant says investigators believe they have identified the man accused of shooting and killing a Biloxi police officer.

Bryant told the Sun Herald that investigators know who they are seeking as the governor visited the Biloxi police headquarters on Monday afternoon. Authorities haven’t released a suspect’s name.

Biloxi Patrolman Robert McKeithen was shot to death in the police station’s parking lot Sunday night.

A police station surveillance camera took a picture of a man before the shooting death of McKeithen. Officers have appealed for help in identifying the man, and a reward offer has risen to $35,000. And on Monday, police were seen searching some apartments.

Bryant writes on Twitter that the shooting is “senseless” and that he met with Biloxi Police Chief John Miller. Bryant, a onetime deputy sheriff, writes “we will find the coward who fired the shots” and arrest him.