Mary Kellerman's father heard her go into the bathroom before school began, and she took a Tylenol. He found his daughter in the bathroom, and she was pronounced dead shortly later. The doctor who treated the Janus family only knew of one chemical that could kill someone that quickly. Four of the 44 capsules from the Janus bottle contained cyanide. They also tested the capsules from the bottle found at Mary Kellerman's house, and again found cyanide.