Broken Little Dolls

The Dollman.
One of Britain's most prolific and brutal serial killers. He's calm, patient, organised and cunning. When he marks someone for death, their end is swift and brutal. Unlike other serial killers, The Dollman has the public on his side.
Including many members of law enforcement.
See, The Dollman targets criminals: rapists, killers, fraudsters. When the legal system fails and technicalities and loopholes free the monsters back into society, The Dollman does what the police cannot.
He takes the monsters down.