A Montana man found slain in his tent this month welcomed his the suspect in his killing, a stranger, to his campsite and offered him a beer, the Gallatin County sheriff said Thursday.

Daren Christopher Abbey, 41, was arrested this week and charged with deliberate homicide in the killing of Dustin Kjersem, 35, whose body was found in his tent near Big Sky on Oct. 12, officials said.

It was a “chance encounter” at the campsite on the night of Oct. 10, and Abbey did not know Kjersem, Sheriff…