The Hanging Of Timothy Evans
Timothy Evans was hanged for killing his wife Beryl and daughter Geraldine in 1950. He was, however, innocent of those crimes, which wouldn't be proven for more than a decade.
When Beryl and 14-month-old Geraldine were slain, police focused their entire investigation on Evans, who actually confessed to the crime. He was a nervous man who was known to drink, and the authorities posited he'd done away his pregnant wife and their child over money.
The crime actually took place at the hands of John Christie, a WWI veteran who testified against Evans at his trial. This didn't come to light until 1966, when it was discovered that Christie was a serial killer. The Evans family lived in the same building as Christie and, in 1949, he may have been approached by Beryl for an abortion. It's possible that after Beryl died during the procedure, Christie killed young Geraldine, as well.
After Evans's execution, Christie moved out of the building. Years later, the new tenant smelled the decaying remains of three additional women Christie had killed and hidden behind his kitchen cabinets. More bodies were found in the yard, including Christie's own wife.
