The ballistics pattern on the turnout floor is consistent with the person who fired off nine shots, with the only casing found inside the Rambler, consistent with a right-handed person securing David Faraday in close proximity to the open passenger door of the Rambler. The Department of Justice ballistics report may also suggest the possibility of two shooters that night. There was one crucial section in the DOJ Report, which stated "All bullets submitted were Western copper coated .22 long rifle bullets, although some were damaged, it was possible to determine ALL but Item  had 6 right hand groove class characteristics". Item  was the bullet recovered from David Faraday's head. The written police report (excluding the drawings) and DOJ ballistics report, both detail the collection of the nine casings from the turnout floor by Sgt Silva and Dan Horan, but neither makes any mention of the tenth casing initially noted on the Rambler floorboard. This casing was not detailed in the ballistics report (likely towed away from the crime scene and separated from the other nine casings). This means we have one casing never examined to see if it matched the other nine. We also have one bullet fired that night (retrieved from David Faraday's head), that didn't exhibit the same right hand groove class characteristics as the other bullets. The phrasing of the sentence in the ballistics report is extremely crucial.
If the bullet retrieved from David Faraday's head was connected to the casing ejected from gun used to shoot him, which ejected onto the Rambler floorboard, then we need to find the tenth casing. If this casing exhibited different characteristics to the other nine casings, as the Faraday bullet may have done to the other submitted bullets, then we more than likely had at least two shooters at Lake Herman Road on December 20th 1968. If the first assailant (who fired nine shots) had written the August 4th 1969 letter, stating "all I had to do was spray them as if it was a water hose", it was very likely he was telling the truth - because from his perspective - he wasn't the one who delivered the close-contact wound that ended the short life of David Faraday one cold December night.