Carey Isaac Regis, Kyle Gabriel and Terrell Lloyd Smith will be sentenced to life without possibility of parole before 25 years after each being declared guilty of two murders as well as two attempted murders.
The jury rendered the verdict Friday afternoon on the ninth day of deliberations following a trial that took several months.
The murders took place on March 18, 2010 when three masked men entered the Flawnego clothing boutique in Old Montreal, shooting two people to death.
Underground figure Ducarme Joseph was allegedly the owner of the boutique at the time of the shooting.