Even going to the restroom might be hazardous to your health. The Calhoun County Sheriff is investigating an armed robbery that happened this morning south of Rockwell City when the victim came out of a roadside park restroom and was hit in the face with a blunt object. The suspect, a white male in his 20s, took the man’s wallet and left in a grey 1980s Ford Thunderbird with an accomplice at the wheel.