BROKEN ARROW - An anonymous donor has posted a reward for information in the case of a missing Broken Arrow man, authorities announced on Tuesday.

Broken Arrow police said in news release that if the disappearance of Justin Cobb, 34, is of a criminal nature, a $15,000 reward has been posted for information that leads law enforcement to his location.

Cobb was last seen about 4:30 p.m. on Aug. 10, in a convenience store at 61st Street and Peoria Avenue. Cobb works for Mullin Heat and Air Conditioning, and customers said he completed service calls and left without incident earlier that day.

The work van Cobb was driving was located in rural Okmulgee County on Aug. 15 after men checking on deer stands reported an abandoned van on private property.

Broken Arrow Police spokesman Mark Irwin said Cobb's wallet, keys, computer and clothes were recovered near the van. There was no blood, no struggle and no sign of foul play, Irwin said in August.

Cobb is a white male who is 6-foot-4 and weighs 208 pounds. He has hazel eyes and a shaved head.

If you have information about Mr. Justin Cobb, please contact BAPD at 918-259-8400 or Det. Pat O'Brien at 451-8200, ext. 8709.