What helped Patterson's claim exponentially was what came back inside of that overdue rental camera, along with:
* Gimlin's story
* Footprint casts, both feet
* Footprint photos, from said overdue rental camera as well as Laverty's camera snapped three days later in the presence of a forest cruiser crew
* Yet more casts taken by Titmus several days later
* A previous 12 years of reported sightings and footprint finds in the area from at least a dozen different people
You are correct: Patterson (alone) was not *believable* because he could be easily discredited by the lawyer mentality. Doubt in his word could be easily instilled, a tactic so easily done to almost anybody that it is done everyday in courtrooms worldwide to everybody so unfortunate to find themselves there. Conversely, it would be impossible to tally up all the people executed worldwide solely based on the testimony of others.
Testimony is critical evidence, as weak as it ultimately is. Its value lies not in proving anything, but in laying the foundation to obtain proof or support other evidence. Patterson and Gimlin were there at Bluff Creek precisely because of previous testimony.
I review BFROs newly published reports every month or so. All are essentially testimony. Most I dismiss entirely. A few times per year I find real gems there. Frankly, they tend to be better because of the depth of the investigation and subsequent reporting. I tend to *believe* some, even not knowing the witnesses at all.
http://www.bfro.net/GDB/show_report.asp?id=76973