Ok, I think I've figured it out. The ppl who were brainwashed into the attacks were all queer men (if the perp knew it = homophobe). The perp knows the inner workings of the museum and probably also knew lambert, ie, probably on the list of people who bought suits from him. He'd want an alibi and claimed he wasn't at the museum at the time. Rot-13 (
https://rot13.com/): Vg'f Oenqyrl Bfobear.