By Brian Ellsworth (Reuters) – As Haiti’s gang-induced humanitarian crisis deepened in October, a group of looters ransacked a supermarket in a well-to-do suburb of the capital Port-au-Prince, leading police to arrest over a dozen people and take them to a nearby police station. They were not there for long. Within hours, the station in the area known as Thomassin came under a hail of bullets from gang members led by a man named Carlo Petithomme, whose brother had been among those arrested, according to two security sources. Petithomme goes by the alias Ti Makak, and leads a gang of the same n…