He breaks into elderly people's retirement homes, robs them and if interrupted will act violently. His first and only dead victim was killed by him inadvertently inducing a heart attack and his next attempted victim was beaten but not killed
Method of Disposal
John Henry is a character in DEXTER. He was a petty burglar who targeted the elderly living in retirement homes until he served six years for assault and is now retired.
Not much is known about his early years as a criminal but it is shown that six years ago he specialized in breaking into old people's homes. During one of these home invasions, one of his victims surprised him and the man had a heart attack and died right there. He at one point broke into the house of a women whom he assaulted and did six years for that B&E. After he got out he was targeted by Ken Olson, the son of the woman he assaulted six years ago. Ken captured him and brought him to the train-yard where he kept saying how the Bay Harbor Butcher was going to clean up the streets of Miami. John managed to break free and escape. He called the police and informed them of his situation where he had been kidnapped by the "Butcher."