I agree with you. Jack is going to be blamed for the murder, but he's not going to say anything because he thinks the real murderer is Amanda. Fake Amanda, not Real Amanda. If he's still under the impression Emily is Amanda, and he knows she's guilty, then he'll want to protect her. Leaving the real Amanda feeling guilty and willing to pay for his high-priced defense lawyer (Courtney B. Vance).

I have my theories as to the body. It can't be Tyler. Not big enough. I think it's the lawyer, who's working with Amanda.