"Who killed Jesus," list, in order:
1. Me, personally
2. Pontius Pilate
3-∞. Irrelevant, none of my business, time to glance back at numbers 1. and 2.

(But if you do want to put the blame on somebody who isn't you yourself - bad move, but understandable - it really is the case that Pilate is your only option. The Creeds are extremely clear on this point.)