GRINNELL, Iowa (AP)  The body of a college student who had been missing since last fall was discovered in a country club swimming pool when a worker removed the cover to get it ready for summer, police said.

Dental records identified the body as Paul Shuman-Moore, 19, a Grinnell College sophomore from Chicago, police said.

An investigation shows Shuman-Moore killed himself, and the official cause of death was listed as drowning, police said Wednesday. Investigators found the he had bound his own legs and hands with duct tape.

Shuman-Moore was last seen alive on Sept. 25. His disappearance prompted an extensive search of the area by police and volunteers.

"For the past six months, we have hoped and prayed that our dear son Paul was alive," his parents, Steve Moore and Betsy Shuman-Moore, said in a statement. "Now that he has been found, we are devastated."

Grinnell College was providing counseling and mental health services for students, said Tom Crady, the school's vice president for student services. He said he participated in the search for Shuman-Moore and said the Grinnell Golf and Country Club property, a few blocks from campus, was extensively examined.

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