My thought process during this scene: Wait, did you just–did he–did he just– What did you do, Jane?
And then: oh god, just stop talking, other serial killer dude, you are signing your own death warrant!
(Oh, also, are we going to get that other suspect back for anything? They played up Lisbon’s instincts on him so much and then arrested him after he and his lawyer made such a big deal about harassment. I can’t believe they’ll just let it go like that. Sad if they do.)