I see no evidence of a second shooter.
I see no evidence of Oswald needing help.
What about the blow out in the back of JFK's head?
What about the entrance wound in JFK's throat?
What about the exploding head shot?
What about the bullet hole in the windshield?
What about the magic bullet's impossible trajectory?
What about Greer slowing the limo down to the "Turkey shoot point"?
What about 2 of 3 shots finding their mark looking thru a wonky scope?
What about Oswald keeping the useless scope on the MC after disassembling/reassembling it?
What about the Keystone DPD's handling of the crime scene?
What about there not being a single print on the MC after disassembling/reassembling it?
Etc...
How can you claim Oswald 100% probably did it when you can't explain a single "what about.." listed above?