Do you mean "it has been shown beyond reasonable doubt with supporting evidence that Lane misrepresented the evidence of a witness who clearly stated she had identified Oswald and refused to be led to other conclusions?"
Because if so, I think all sceptics are thoroughly convinced and do not need a repeat performance.
This is what I was referring to:
Mark Lane: "She [Markham] said he [the shooter] was short, a little on the heavy side, and his hair was somewhat bushy. I think it is fair to state that an accurate description of Oswald would be average height, quite slender with thin and receding hair."
"Mrs. MARKHAM. He was short.
"Mr. LANE. He was short?
"Mrs. MARKHAM. Yes.
"Mr. LANE. And was he a little on the heavy side?
"Mrs. MARKHAM. Not too heavy.
"Mr. LANE. Not too heavy, but slightly heavy?
"Mrs. MARKHAM. Well, he was--no--he didn't look too heavy.
"Mr. LANE. He wasn't too heavy and would you say that he had a rather bushy kind of hair?
"Mrs. MARKHAM. Yes; just a little bit bushy.
"Mr. LANE. It was a little bit bushy?
"Mrs. MARKHAM. Yes.
We can see that the relevant part of the tape recording of the conversation as transcribed matches in every detail Mark Lane's summary.
So, yes, sceptics of the claim that Lane 'lied' about the telephone conversation have been validated.