While I will pursue this further per Bruce’s thoughts, I also don’t think the DL and physical specifics change my suspect much either way. I don’t think it rules him in or out if it fits or not. I think you ultimately need hard evidence to do that.
I wanted to elaborate on this... witness testimony and descriptions of events is known to be poor, especially in traumatic events. The description of Cooper is that of an
average middle aged white male. If he was physically
unique (e.g. very short or tall, obese) or had a more
specific characteristic (e.g. large scar on his face), then I'd agree it's more useful evidence. If he was 5'8" or 6'2", we wouldn't be far off from the description and in that range we capture pretty much everybody.
As a personal example, a month ago I was driving down a remote road with a couple friends and we came across a crashed car in a deep ditch. We checked to see if anybody was in it but it was empty and had looked abandoned. About 15 minutes later down the road, we realized that we should probably call the police to report the car as possibly stolen. Once we considered that, we asked ourselves, "What did the car look like?"... We all remembered a different colour and weren't sure what the model or approximate year was.
If you take a roomful of people and ask them to close their eyes and listen to the sounds in the room and after a couple minutes stop the experiment and ask them how long the exercise was, you'll get a huge range of interpretations. Some would say 30 seconds and others 5 minutes.
It seems like my opinion is out of step with law enforcement and the FBI. Since they are vastly more experienced than me, I defer to their expertise. But, I'm also skeptical of that viewpoint nonetheless because it doesn't match my understanding of human observation and behaviour.
While all my evidence is circumstantial, I believe it would outweigh somebody that doesn't quite fit the profile, short of my suspect having a unique or specific characteristic that is widely identifiable.
Maybe it's a moot point because an investigator should attempt to find all relevant information, but a negative hit on height or hair colour can't negate the other stuff in my view because the collective circumstantial evidence would simply outweigh it.