For over twenty years, Amelia Dyer terrorized the city of London killing innocent babies and gaining the moniker of Baby Butcher in the process and becoming one of the most famous serial killers in history. Her modus operandi was simple. She would advertise in the paper and offer adoption services to unmarried women charging them a certain amount in return. She would take the babies and promise the mothers of giving them an life they would have dreamed of. Once she adopted these babies she would completely neglect them, which caused their death in several cases. Later she started strangulating them and using opium injections to kill them. Caught in 1896, and sentenced to death, she was one of the most prolific female serial killers killing almost 247 babies.