A young offender who stabbed an 18-year-old to death in an act of “cruel irony” at a knife awareness course has been jailed.
Vladimir Nachev stabbed Hakim Sillah twice in the chest in the unprovoked attack at Hillingdon Civic Centre in Uxbridge in November.
Nachev, 18, of West End Lane, Hayes, was previously convicted of murder.
At Isleworth Crown Court on Monday he was jailed for life with a minimum of 18 years.
Judge Pushpinder Saini QC said Nachev had carried out an “unprovoked attack of exceptional violence”.