25 year old Donald Owusu and Harvey MacFoy, 26, were both found guilty of the murder of 33-year-old Albert Amofa.
They mistakenly believed Amofa had a large quantity of drugs in his car and stabbed him in the leg multiple times; he died in hospital the next day.
32 year old Theo Brown was also found guilty of perverting the course of justice for disposing of the car used in the attack.
All three will be sentenced at a later date.