it was a 1982 manslaughter armed robbery, coincedetnyl it took place in the parking lot of the 99 in charlestown... cahills acomplice was a townie, ill call him RED( not southie red) they set up a coke dealer from roslindale, and when the kid fought back they stuck him.... he ended up bleeding to death cahill got 7-10 i beleive. and RED i dot know what he got... someone siad he ratted cahill out.... Although cahill worked in medford and malden with anthony barry, angelesco and giangrande back inthe day, he also worked with billy brymer in southie, and also a few guys from charlestown and east bosotn. cahills father Tom cahill was a coke trafficker that worked with red shea in southie and a few charlestown guys. when whitey bulger ratted the southie coke ring out only 3 members out of dozens didnt rat..... TOM CAHILL, JOHN RED SHEA AND GEORGIE BOY HOGAN.