Authorities are seeking help finding a walkaway from a Billings pre-release center.
Glen Lilly is 6 feet 5 inches tall, 290 pounds with black hair and brown eyes.
He walked away from the Alpha House Pre-Release Center about 6:15 p.m. Wednesday.
He was sentenced for criminal endangerment out of Yellowstone County on Aug. 1, 2013, and arrived at Alpha house March 16.
Call 911 if you have information on his whereabouts.