yvan vaillancourt and a friend planned to rob a local pool hall. before the robbery they had agreed to only use knives. however, when his friend showed up for the robbery with a gun vaillancourt made him take the bullets out and place them in his glove. immediately after the robbery took place, vaillancourt saw his friend go back into the hall where a fight broke out between his friend and a customer. in the struggle, the customer was shot with his friend's gun and later died of his wounds. vaillancourt was caught by the police at the scene but his accomplice got away.