Two robbers planned to commit armed robberies targeting older victims. However, when the time came to actually commit the robbery, one of the robbers, thinking that the potential victim looked too much like his grandmother, backed out and told his cohort that he was going home. The second robber went ahead with the plan and robbed the elderly victim, who died of a heart attack due to the stress of the robbery. The second robber was arrested and implicated the first robber. What crime(s) has the first robber committed
