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KEIZER, Ore -- A Keizer man missing for more than a month was found dead in a field in rural Marion County Wednesday, police said.

Robert Allen Knupp, 54, was reported missing June 8 after his car was found at a rest area off Interstate 5 south of Salem. He was last seen the day before in Albany.

Police have not said how long they think Knupp had been in the field or the cause of death. They explained that those details were still under investigation and an autopsy was pending.

Knupp's employer, Garten Services Inc., offered a reward of up to $500 for information on the whereabouts of Knupp.

Knupp is 5-foot-11, 215 pounds. He has salt and pepper hair and a short beard. He was last known to be wearing a blue Hawaiian-style shirt with khaki pants, white socks and brown leather shoes.

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