Mark Warren, 28, was killed on August 14, 2013, on Detroit’s west side in the 14000 block of Robson Street, near Grand River Avenue and Greenfield Road. He was reportedly abducted by a group of people, taken to a vacant house on the block, beaten and then shot. Reports say three men were involved in the abduction and shooting, though their identities were not established at the scene.

Databases that track Detroit cold cases list Warren’s death as unsolved.

If anyone has information about that block of Robson Street in August 2013 or remembers seeing suspicious activity or those involved, please share what is known with investigators.