Today I chose to explore the sound of gunshots ....and specifically from a PPK 38 caliber. You Tube has several examples of live fire and there is a huge difference in the blast sound depending on where it is fired meaning out in the open or in an indoor space. The sound in a gun range was definitely duller type of sound....but
this I will say--there is nothing about the blast from a PPK that is just a pop !
It occurred to me that shots in the truck's extended cab containing sound absorbing seats and at least two adult male bodies and windows closed might sound very different than a shot in the truck's cab that just blew out a window.
The cadence of the sounds were identified by the expert were "boom..boom" and subsequently a single "bang"......The first sounds seem to have occured before the vehicles appear in the video and so they would have been further from the microphones in the Bobcat surveillance system. Perhaps "boom...boom" may not be the best descriptor of the sound from a pistol but the cadence seems believable as being possible gun shots.
The next sound described as "bang" as in a single shot could be taken as a followup shot under slightly altered conditions such as a window in the truck being blown out and not so well insulated and also closer to microphones. All possibilities and all believable and had I been a juror when this evidence was presented, it would not have been a huge stretch for me to come to that conclusion.
I understand that there is now a fast developing field of expertise known as forensic gunshot acoustics in which investigators focus especially on recordings of gunshots following an incident. There is a very good article online that is most informative--- Gunshot Foresnsics:What's in a Bang ? (
www.the.soft.anonymous.com)
Perhaps not far enough along currently to resolve the issue in this trial but I would most definitely be holding on to the video and audio from this exhibit for the future. I wonder even now if there is a means to measure the decibel pattern of all three sounds as the can be heard.
All interesting speculation and not just personal opinion