SPOKANE, Wash. -

Authorities say new DNA tests show blood found in a workshop near Spokane Valley belongs to a 32-year-old man who has been missing for nearly a year.

The Spokesman-Review reports Bret Snow, of Spokane Valley, was last seen Dec. 3, 2015. Court documents say he may have been killed over a drug deal involving a group of people from Montana.

Investigators searched a residence in Newman Lake in June, where Snow's cellphone was last active. They found blood and hair in a workshop in the backyard.

The state forensic lab confirmed the blood samples belonged to Snow last month.

Court records show a friend drove Snow to the residence the day before he went missing, and two residents saw him leave the home with a group of people.