SUPERIOR, WI (KDAL) - Superior Police are investigating a strong arm robbery that sent an 84 year old woman to the hospital for treatment. Police say the woman answered a knock on her door at 6:30 a-m Sunday. When she opened the door, a man punched her in the face, knocking her to the floor. The suspect then entered the home demanding cash. The victim provided what cash she had and the suspect then searched the home and took some other items. The suspect is described as a white male, 25 to 35 years old, wearing a dark jacket, a black t-shirt, cream colored shorts and white tennis shoes. He may have been driving a blue, late 1990's, 4 door General Motors car, possibly a Chevrolet Lumina.