These photos are great! Not only the historical value but in quality too. In 1970 the Department sent me out as an Evidence Technician and the camera was the old 4×5. You know, the one with the bellows and you had to slide the photo plates in and out to get your exposures.
The quality was outstanding and I would venture a guess that it is still one of the best quality cameras today.
http://pavel-kosenko.livejournal.com/303194.html?thread=22669914