Vito having that guy hit in mexico might have been his most impressive hit or order. Must have cost some $$$. Or gallos best friends set him up. Him have the spanish guy hit in sicily to.
Vito might have ordered the hit but there is another possibility that the Desjardins crew might of also had reasons to order the hit. Prior to getting killed M.Gallo aligned himself with Montagna. According to a La Presse article, the police recorded a conversation between Desjardins and Mirarchi that they wanted to eliminate Montagna allies.