A heroin addict who chased a man down a station platform before stabbing him to death in an unprovoked attack has been found guilty of murder.

Jamie Simmons never told police why he killed 23-year-old Samir Draganovic in November last year at Knockholt station near Sevenoaks.

The jury took less than 90 minutes to reach a verdict that Simmons murdered Draganovic, whose body was spotted by a passing train driver later that night.

CCTV showed the pair running off the end of the platform, and then Simmons returning alone.

He had tried to plead guilty to manslaughter by diminished responsibility, saying he couldn’t remember the incident.

Simmons, of Blackfriars Road in London, handed himself into police three days after the murder following a public appeal.

He will be sentenced tomorrow folling a three-week trial at London Inner Crown Court.

Senior Investigating Officer Det Ch Insp Paul Langley, said: “Simmons tried to claim that he couldn’t remember ever assaulting Draganovic but the court saw through his attempts to avoid justice.

“This was a brutal attack against a young man and appears to have been entirely random. Samir was simply on his way home.

“Simmons is clearly a dangerous individual who should not be out on the streets and so we are pleased he was found guilty today.”