Chas Whitman stabbed his mother and his wife to death...demonstrating that he was a homicidal maniac. It was probably caused by a tumor in his brain that drove him crazy. From his youth he loved guns. https://en.wikipedia.org/wiki/Charles_Whitman
That Oswald was homicidal... theory...speculation....conjecture....guesswork.....supposition ...etc
Wrong again. First, it obviously is not necessary to demonstrate that an individual has a track record as a "homicidal maniac" to prove they assassinated the president. Was John Wilkes Booth a homicidal maniac? Putting that aside, it was Oswald rather than Whitman that had a track record of homicidal intent in his past. Oswald tried to kill Walker. Whitman had no such record of murderous violence in his background. If anything, Whitman was a much more stable individual than Oswald. He had never, for example, defected to the USSR. In Whitman's case, he had not attempted to kill anyone before he went on his final rampage. He killed his mother and wife as part of that event just prior to the shooting. Their deaths were related to whatever mental breakdown he had that precipitated the mass shooting. He was not a person, like Oswald, with a prior history of violence that would demonstrate that he was a homicidal maniac as you have dishonestly suggested here.