Jason Isaacs stabbing: Arrests made in Northolt murder probe
Two more teenagers have been arrested on suspicion of the murder of an 18-year-old apprentice carpenter stabbed in north-west London.
Jason Isaacs, described as "amazing" and "beautiful", was found critically injured in Newnham Close, Northolt, on the evening of 18 November.
He died from his stab wounds three days later.
An 18-year-old man from Watford, and a 16-year-old boy from north-west London, were arrested on Tuesday.
A £20,000 reward has been offered by police for any information which could lead to the prosecution of Mr Isaacs' killers.
His mother, Sharon Kendall, said: "Our amazing, beautiful Jason went out with friends for a night out and a few drinks.
'Our lives are in pieces'
"He should have come home to his loving family. Our lives are in pieces."
The two latest arrests follow the previous detention of a 17-year-old boy on 30 November who has been charged with murder and is due in court on 20 February.
Det Ch Insp Noel McHugh said: "It has been three weeks since Jason was attacked and killed.
"We have charged one male and made two further arrests, but we continue to appeal for anyone who witnessed the attack, or anyone with information to come forward.
"Our suspects are four people riding on two mopeds. At least one of them was not wearing a crash helmet."
The Met Police say the 18-year-old has been released under investigation, while the teenage boy remains in custody.