He camped with them and then killed them and committed suicide... a mysterious crime that shook an American state

The Iowa Department of Public Safety said the bodies of three people shot dead Friday were found in Makoketa Park, along with the body of the shooter.

Police were called at 6:20 am local time to the park where they found the bodies of the dead in one of the camps, while one of the camps was missing.

The department said in a statement that, after searching, officers found the body of the gunman who apparently shot himself in the west of the park.

The department identified the shooter as Anthony Orlando Sherwin, 23, without revealing the identity of the victims.

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