Yup, something similar happened in my family; My first cousin, his name was Charles Dorsey, had Cabrini Green for some years; His power base was always the 1340 crew, aka "The Fabolous" aka the "crazy crew". The day he got hit in 96, his 24 hour security was mysteriously absent; and the only person with the power to call off his bodyguards was the governor at the time, who was from the 1340 crew, and the only way he woulda got hit in the first place was if people knew his crew would not retaliate, so I always felt someone from the other faction must have reached out to them, promised em something...
So yeah, isolate a dangerous guy, first step to killing em...