Maher is a very thorough individual. Your selling him short. You do Not know what he has done or not done.
I can only judge Maher's views on the JFKA based on his comments. His skepticism about the SBT parrots the objections to it that were presented in Oliver Stone's fictitious movie. It's possible he could have got his ideas from other sources which have raised the same invalid objections and which are also based on the false premises that JBC was directly in front of JFK, at the same height, and facing straight ahead and also that JBC reacted to being shot at a different time than JFK.
Who is Dale Myers and what courts have admitted his ballistic evidence?
To the best of my knowledge, there has never been a court case where Myers' 3D virtual recreation of the shooting would be relevant. The same could be said of the Knott Lab reconstruction of the shooting. Do you know of such a case?
For what it's worth, Dale Myers did win an Emmy for his work on ABC's documentary which aired around the 40th anniversary of the JFKA.