Four jailed for Dean Mayley killing in west London
Four teenagers have been jailed for killing a man with a mental age of nine who was stabbed during a mugging in west London.
Dean Mayley, 24, was stabbed in the heart while walking alone in Ruislip Road in Greenford in February.
Jamal Jones, 17, from Acton, was jailed for life at the Old Bailey, to serve a minimum of 15 years for murder.
Michael Mensah, 18, Ryan Beresford, 19, and Miguel Leiba, 17, were jailed for manslaughter.
A CCTV camera captured the fatal attack in which three hooded figures are seen approaching and confronting the victim before one of them lashes out with a knife.
Mr Mayley, who had learning difficulties due to a brain condition called microcephaly, collapsed in the road and later died in hospital.
Leiba, from Hanwell, Beresford, of Acton, and Mensah, from Greenford, had been cleared of murder but convicted of manslaughter and also found guilty of the attempted robbery of Mr Mayley.
Leiba, who was 16 at the time of the offence, was jailed for 14 years for manslaughter and eight years for attempted robbery, to run concurrently.
Beresford was sentenced to 15 years for manslaughter and eight years for attempted robbery, to run concurrently.
Mensah was jailed for 15 years for manslaughter and nine years for attempted robbery, to run concurrently.
He was also found guilty of an earlier robbery on 28 January and was sentenced to two years for that offence, meaning he will serve a total of 17 years.
Sentencing the four, Judge Martyn Zeidman QC told them: "It was Jamal Jones who plunged the knife into Dean's heart.
"But make no mistake, you all have blood on your hands. You each played an important part in this event and you did so knowing that Jamal had a knife and realising that he might stab Dean with it.
"Put bluntly, now Dean is dead and it's your fault."
In a family victim impact statement from Mr Mayley's mother, Donna, she said: "The loss of our lovely Dean has ripped our family apart.
"It is hard to comprehend that we will never see him again."