'Road rage' killer wrote letter to BBC while awaiting trial
A man [guilty of the road rage killing](http://Matthew Daley guilty of manslaughter over ) of Don Lock wrote a letter to the BBC while he was awaiting trial.
Matthew Daley sent three handwritten sheets of A4 paper giving his version of what happened that day.
In it, he claimed Mr Lock was "using his car offensively and deliberately trying to intimidate me" before he stabbed him 39 times.
But the letter was seized before it was posted and later used in evidence in court.
Daley said he acted after Mr Lock allegedly began "shouting and swearing" at him, but claimed because of his autism "the other sounds were silent".
He wrote: "When I looked at his face all I saw was his anger and aggression."
Daley claimed he then "broke gently then firmly" and "the car crashed in behind me".
He said he was "unaware" what to do and "just wanted the aggression to stop".
"I didn't want to look at his angry face so I turned towards my drivers door and just put my feet into the road. I could feel all the other cars stopping behind me.
"He walked fast up to me wearing bright colours...I stood up moving his aggression away from me."
Mr Lock, 79, died at the scene after being repeatedly stabbed in the head, neck and chest on the A24 at Findon, near Worthing, West Sussex on July 16 last year.
Daley was heard screaming "die you f****** c***" as he carried out the brutal attack.
He was cleared of murder but found guilty of manslaughter on the grounds of diminished responsibility.
Before the killing Daley's family had "pleaded" with doctors to section him as his mental health declined, the trial heard.
NHS chiefs have apologised to his relatives for not doing more.