TWO South Yorkshire killers feature on a list of convicts deemed so dangerous they will never be allowed to walk the streets again.
Anthony Arkwright and Arthur Hutchinson are among 35 murderers judges have agreed must never be freed from prison, the list released under the Freedom of Information Act reveals.
Arkwright, now aged 40, was jailed for the savage murder of his grandfather and two neighbours in Wath and Mexborough 20 years ago and Hutchinson, 67, killed three members of the same Sheffield family and raped another.
Arkwright, who was 21 at the time, killed his 68-year-old grandfather Stasys Puidokas and neighbours Raymond Ford, 46, and Marcus Law, 26, in August 1988.
He is also suspected of killing his grandfather's elderly housekeeper Elsa Konradaite, 73, but the case never reached court and was ordered to lie on his file.
Arkwright stabbed his grandfather in his head, cheek and abdomen before shattering his skull with a sledgehammer.
He then broke into his nextdoor neighbour Raymond Ford's home and hacked him to death - stabbing him 540 times and breaking 11 of his ribs. The former teacher was also disembowelled.
On the same day he trussed up and gagged his disabled neighbour Marcus Law and stabbed him around 70 times. He was jailed for life in 1989.
Hutchinson was jailed after he broke into a house in Dore, Sheffield, killing three members of the same family and raping another in 1983.
The serial killer gave himself the nickname "The Fox" and was on the run for rape when he stabbed a new bride's parents and her brother to death before raping her sister.
He broke into a property owned by solicitor Basil Laitner and his wife Avril, and stabbed them both to death along with their son Richard the day after their daughter Suzanne got married,
Hutchinson, who was 42 at the time, then raped the youngest of the Laitners' daughters, Nicola. David Bieber, 43, who murdered Sheffield-born PC Ian Broadhurst in Leeds and tried to kill two other officers, is no longer on the list after he had his whole life tariff overturned last year.
He must serve 37 years behind bars before he can be considered for parole.
PC Broadhurst spent the first few years of his life in Parson Cross and was working as a police officer in Leeds when he was shot dead by Bieber when he questioned him about a car he was driving with false number plates.
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