Another neighbor, Helen Metzger, was perceived by Harvey as a threat to Carl. He sprinkled arsenic on some leftovers he gave her and in a jar of mayonnaise in her refrigerator. Several weeks later he gave her a pie laced with more arsenic. She developed paralysis and needed a tracheotomy to facilitate breathing. But following the tracheotomy, she began hemorrhaging and lost consciousness. She never came out of it. The hospital attributed her death to Guillain-Barré syndrome, a paralyzing condition that can affect the lungs.
