Without evidence for the claim, I'll avoid believing conspiracy theories.When the Mafia operates...it is all perfectly planned. They prepare all the evidence that will lead the law enforcement towards a scapegoat. A patsy...and that was Oswald.
But in order to prevent this patsy from speaking in a courtroom, they will have him killed before the trial begins.
And this is a pattern many criminologists and DIA* judges have always spoken about with so many examples.
*Italian AntiMafia Police Department