A Salem company is putting up a $500 reward for information that helps Oregon State Police find 54-year-old Robert Knupp, who disappeared last month. 

OSP Lieutenant Gregg Hastings says Knupp was last seen June 7th in the Albany area, and reported missing the following day, when his car was found abandoned at the Santiam rest area along Interstate 5, south of Salem.

KNUPP has worked 17 years for Garten Services, Inc., a Salem-based 501(c)(3) non-profit organization established in 1970 to support people with disabilities in their effort to contribute to the community through employment, career, and retirement opportunities. At the time of his disappearance, he was working as a custodial supervisor.

Garten Services, Inc., has established an account at US Bank under "Robert Knupp Reward Fund" in case anyone wished to donate.

KNUPP is described as a white male, 5'11", and 215 pounds, with brown salt & pepper hair and a short beard. He was last known to be wearing a blue print Hawaiian-style shirt with khaki pants, white socks and brown leather tie shoes. He was driving a 1993 Geo Metro passenger car found locked Sunday, June 8, about midnight at the rest area.

Anyone with information regarding KNUPP's whereabouts is asked to call OSP Northern Command Center dispatch at 800-452-7888. Lead investigator is Detective Richard Olsen.