Two men have been found guilty of killing 19-year-old Fabian Kacica while trying to steal his car in Southend in May.
Joe Paffey, 20, of Old Southend Road, Southend, was convicted of murder and attempted robbery following a trial at Basildon Crown Court.
Aidon Pearce, 20, unemployed, of Treecot Drive, Leigh-on-Sea was found not guilty of murder but guilty of manslaughter and attempted robbery.
At around 9pm on Monday 14 May, Fabian Kacica parked his car near The Forum. His car was surrounded a group of men.
Pearce pulled the car keys from the ignition which led to Fabian striking him. Paffey then lunged forward and forcefully stabbed Fabian in the chest. Fabian fell to the ground and died a short time later.
In a statement on behalf of the family, Fabian's sister the family had been ripped apart and called for the pair to be given life jail sentences.
Paffrey and Pearce are due to be sentenced at Basildon Crown Court in January.