In a suburb of Philadelphia, William Wanko and his wife Michele had been up late drinking. Michele asked her husband to teach him how to use a gun, so she could defend herself from a hypothetical home invasion if he was not home to protect her. He got out a loaded pistol and handed it to her, then went to get another gun. Michele pulled back the slide on her gun and released it, causing the gun to discharge. The bullet struck her husband in the chest and killed him.