Caution, might contain spoilers, though I'm at 51% completion.
It would appear that some Operation heads would not say a thing when arrested, while others would sing like birds.
Does it depend the order at which you defeat a certain OP Head ?
Example: If I take out El Emisario first he'll not say a thing, but If I take him out last, he'd have talked when interrogated during the cut scene ?
Ah, poorly chosen example, my reasoning for asking the question is:
While going after El Cerebro, they guy I end but getting tells me that I missed the real El Cerebro. He was the first buchon I got for that Head, while the last buchone I captured for the previous Head was the (real) singer that said "You better get a pen and a whole lot of paper" when prompted to talk. Right at the El Cerebro moment I got the feeling If I went after him last then the guy I caught would have ended up being the real deal leading to the Head above him and not just a dead end.