The man has murdered two people in attempting to emulate other serial killers
A teenage "monster" has been detained for a minimum of 27 years for stabbing two strangers to death.
James Fairweather mouthed towards his parents "I don't give a ****" as he was sent down at the Old Bailey.
Justice Spencer, sentencing, said the killings were "brutal and sadistic".
He added: "You are well aware of the publicity this first murder attracted. I have no doubt you relished the sense of power and control that it gave you."
Fairweather was 15 years old when he carried out the random attacks, emulating his idols - the Yorkshire Ripper and Ted Bundy.
He stabbed 33-year-old Mr Attfield 102 times as he lay drunk and helpless in a park in Colchester, Essex, in March 2014.
Three months later, he attacked Ms Almanea, 31, with a bayonet as she walked along a nature trail in the town.
He stabbed both through the eyes.
Justice Spencer said: "I have no doubt the way James Attfield screamed in pain when he was stabbed through the eye had remained with you and excited you."
Fairweather was prowling the same area for a third victim when police finally stopped his killing spree in its tracks in May last year.
At the time of his arrest, he was wearing gloves and armed with a lock knife.
Following his conviction, Mr Attfield's mother, Julie Finch, had said: "James Fairweather is a monster in our eyes - and we will never be able to forgive him."
The court heard Fairweather was "turned on" by serial killers and researched Ian Huntley, Myra Hindley and Peter Sutcliffe.
Ted Bundy, who was his favourite serial killer, sexually assaulted, murdered and decapitated his victims.
Fairweather, who has autism, had been playing violent computer games Call Of Duty and Grand Theft Auto since he was 13 years old.
And he had a stash of horror films including Wrong Turn: The Carnage Collection, a DVD about Sutcliffe and a book called The World's Worst Crimes.
Police said that after he killed, he obsessively looked up press coverage of the murders on the internet.
He claimed he was possessed by the devil, admitting manslaughter - but was found guilty of the murders at the Old Bailey.