I just point blank don't believe he did it.
Let's say I kill a high profile individual on the street you know, hypothetically.
Do you seriously believe that I'd be casually hanging out in public at a McDonalds with a manifesto and loaded gun in my bag? I'm pretty sure that my first port of call if I was assassinating someone would be "Burn all the evidence in an alleyway somewhere, get new clothes on, and lay low for pretty much the rest of my fucking life, possibly in Mexico"