@Mr_Detective
No, I didn't think that far. Because, honestly, I didn't know what was Himuro has to do with all this monkey business. He was acting suspicious for sure, but there were so many things happening, including how he was so persistent in denying that he wasn't working together with these monkeys even though Anzai tortured him so bad.
But since you mentioned Hasegawa, now I remember he was the one who released Himuro thus made him partly responsible for the emergency phone fell from the cliff. Hmmm.... This is getting interesting.