The Muskogee County Sheriff's Office identified the man whose body was found in the Canadian River near Porum Monday.
Investigators said foul play may be involved in the death of 44-year-old Jack Warren. Warren was a Muskogee resident, according to Deputy Brandon Caster.
Oklahoma Highway Patrol responded by air boat after the body was found around 6 p.m. Monday, authorities said.
Caster said they are waiting on the Medical Examiner's report to make the final determination of cause of death.