He didn't "pull out a revolver". That's LN mythology. It's not supported by either McDonald's account or Walker's account.
Besides, is this supposed to be evidence of murdering anybody?
He didn't "pull out a revolver". Mr. BALL - What happened then?
Mr. McDONALD - Well, whenever he knocked my hat off, any normal reaction was for me to go at him with this hand.
Mr. BALL - Right hand?
Mr. McDONALD - Yes. I went at him with this hand, and I believe I struck him on the face, but I don't know where. And with my hand, that was on his hand over the pistol.
Mr. BALL - Did you feel the pistol?
Mr. McDONALD - Yes, sir.
Mr. BALL - Which hand was--was his right hand or his left hand on the pistol?
Mr. McDONALD - His right hand was on the pistol.
Mr. BALL - And which of your hands?
Mr. McDONALD - My left hand, at this point.
Mr. BALL - And had he withdrawn the pistol
Mr. McDONALD - He was drawing it as I put my hand.
Mr. BALL - From his waist?
Mr. McDONALD - Yes, sir. Walker’s relevant testimony was already posted earlier in this thread.