Of course he did. It happened in TX and who had the most to gain? LBJ. The fact that he was now President also enabled him to insulate himself and steer the investigation.
I’ll be in 50 years, LBJ’s culpability will be common knowledge.
#1.) Ken O'donnel and Dave Powers sitting less than a foot away from where Hickey would have discharged his weapon, and they didn't seem to notice that the guy in the car with them blew the presidents head off? or did they just decide to instantly plot a complex cover story for their closest friend's accidental murder and become a part of the largest cover up in American history to protect a bumbling, but astonishingly accurate secret service agent?
#2.) what about the Newman family? they were aligned with the front bumper of the secret service car at the time of the head shot, but they did not notice an ar-15 going off a few feet in front of their eyes? Didn't hear it? ...NO...they state, not 15 minutes later, and on live television that every shot came from behind them up on the "knoll"...so did someone from the secret service get to them and tell them to shut up? here is a link to their interview 15 minutes after the assassination: http://youtu.be/iC1ebqkXGTk
How about Charles Brehm who was directly across from the secret service follow up car and the closest street witness to George Hickey at the time of the head shot, would he not have noticed a rifle going off that close to him? would he have not seen it? look at the photo below that has a yellow arrow pointing to George Hickey, Charles Brehm is the man in the tan jacket no more than 10 ft from Hickey...he wouldn't have noticed the Hickey firing his rifle? come on now ...
photo is a frame from the Bronson film showing George Hickey at the time of the fatal headshot, it goes from normal to extreme blow up ..yellow arrow is pointing at Hickey....notice again Charles Brehm in the Tan jacket...here is first interview, just moments after the assassination http://youtu.be/S8Vk3WY1GBA and just look at all the people standing around the car, yet not one witness to this secret service man standing up high enough to clear the windshield and fire his weapon ...