Utilizing the features of soot and stippling patterns can not only help differentiate among contact, close, and distant range gunshots. But also help determine if a silencer was attached to the gun. Malcom Fletcher did carry out comparison experiments much like the example below. However based his conclusion exclusively on the presence of blood inside the silencer.
Is it safe to assume the results of Fletchers experiments did not benefit the prosecution?
Did Major Mead form any opinion on this I wonder?

Photo thanks to Prof. Karl SeIlier - Institut fUr Rechtsmedizin der Universitat
Stiftsplatz