None I hope!
Once the detainees are faced with legal consequences of their crimes AND they comprehend the requirement for payment on damages... maybe, they will TALK about their paymaster and the others, who have ‘deployed’ them.
Not one of them should be released until/unless they provide that information. It’s certain that they are not ‘salt-of-the-earth’ representatives of the ‘downtrodden’ or selfless Crusaders for ‘justice’.
Without avowal of a connection to organized crime, then they are admitting perpetration of the crimes in their OWN name and can take the consequences, personally. PERIOD!!
I suspect that the little thugs on the front lines are double or triple isolated from any knowledge of who is paying for this and has instigated it. But with a little encouragement they will probably rat out their immediate leaders and we can go from there.