The name of the man found dead behind the old post office in Grass Valley the morning of Dec. 26 was released Monday. It took five days to locate next of kin for Kevin Lamar Kuhn, said Nevada County Chief Deputy Coroner Rich Fevinger. “It’s atypical,” Fevinger said. “We always can find the next of kin rather quickly, usually on the same day. In this particular case, it was a little more difficult. He didn’t have much family out there.” Kuhn, 49, was temporarily homeless after having problems with his common-law wife, Fevinger said. “They had some kind of domestic …