so what the streets was watching when he killed those guys in the drug deal gone bad with his dumb azz relative
Carlito was by himself when that situation went down so he got away with it, if he had killed Benny then Pachinga would have snitched to the police just like he snitched to Benny about Carlito's plan of getting on that train... and just like how Carlito's other friends tried to set him up with the wire-taps.