Has the profile of Cooper changed over time? How does law enforcement's early profile of Cooper compare with a present day profile?
The short answer is, "Yes." The profile of DB Cooper has changed over time. That said, there are fractions within the FBI that see DB Cooper in different ways, so their "profiles" are not in agreement. In fact, I don't know of any definitive "profile" that has been developed. But we have the following:
1. Early on, Himmelsbach acknowledged that Cooper had guts and had the upper-hand for using a bomb. He saw Coop as a smart guy, but still called him a sleazy, rotten crook, although he has never described WHY he saw Cooper in those ways.
2. Some commentators, such as Walter Cronkite, described DB Cooper as a "master criminal."
3. Many FBI agents thought DBC was a professional skydiver and felt he would be found in the annals of the US Parachutist Association. Earl Cossey dispelled them of that notion, and that might have been the starting point of the drift towards viewing DB Cooper as a bumbling fool who was just smart enough to get himself killed.
4. That was the prevailing view of Larry Carr in the 2008-2010 era. The jump was too tough, he posed, and DBC died. Cossey added all the necessary plausible technical aspects to support that narrative.
5. However, when Cossey's reputation started going down the toilet in 2011 when GG's SKYJACK came out and our follow-up investigation of Norman Hayden and the parachutes, the FBI backed away from the tumbling, bumbling frostbitten fool who cratered. Curtis Eng certainly never gave his perspective on who DB Cooper might be, and held his tongue until 2016 when he wrapped up the case with Frank Montoya, Jr., who is now a talking head for MSNBC, btw...
6. That said, LD Cooper was described as the "most promising suspect" in 2011 when Marla walked through the door with an FBI imprimatur stamped on her Uncle LD dossier. However, the term "most promising suspect" was uttered by Ayn Dietrich-Williams. That suggests that LD looked pretty good for DBC in internal discussion up on 3rd Ave in Seattle, but that moniker never got pushed publicly once Ayn spilled the beans to journalist Alex Hannaford in June, 2011. Simply, no one has ever said WHY LD Cooper was so promising. Hence, many of us figured something else was in the works beyond LD's capacities to steal an airplane.
Well, what you are describing falls more in the category of opinions and opinion swapping (or opinion shifting with every change in social currents and circumstances) as opposed to real profiling, which is in fact a fairly rigorous process as it has come to evolve to the present day.
The archetype for 'profiling; is what what Fitzgerald and his colleagues did in the Unabomber case. Modern profiling starts with building a body of facts and then trying to connect them. I already mentioned the historical roots starting with Carl Seashore. One of the next people in the chain of people and theory which lead to modern profiling would be Dr. Leonard Bloomfield (a linguist, psychologist, sociologist) who created something he could teach called 'Componential Analysis". Fitzgerald and his helpers used 'comp analysis', literally. See You are not allowed to view links.
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When you can perform 'comp analysis' with actual case data then you can claim you are profiling.
The theory behind comp analysis is that people carry social and linguistic markers which are fairly stable throughout life. If you recall I objected to Carr saying that Cooper had no accent. Those words of course are not what Carr was trying to say, or meant. Carr didnt have the technical language to explain what he meant. Carr's (and Tina's) reference was to phonology. And as Leonard Bloomfield taught, phonology is very specific to individual people and small classes of people on this earth! If there was a recording of DB Cooper we should be able to nail Cooper's phonology down to a section of the world, and then a smaller area within that! That is what 'comp analysis" is all about and what it does. That is what profiling does! Himm's opinions are not profiling. Profiling is an actual analytical process. It is what Fitzgerald became competent at doing (with the help of academically trained people) and what he did in his attempt to identify the Unabomber. If we had enough data the same thing could be done for DB Cooper ... or the new suspect named 'Chuck Dooley' ?
Who has no accent or no linguistic markers? Actors, newscasters, people that are trained to not have an accent. Tina spent over 4 hours with Cooper and what do we have from that? Not much.
1. Did the FBI record their interviews with her and just summarize on the 302's, maybe used a stenographer?
2. Could she have said more about his speech and mannerisms and it just did not make it into the 302?
3. What if Cooper did have linguistic markers? Could he have been from Philadelphia like Tina, and his accent did not seem like an accent? She was living in Minnesota for a bit, could he have had a Minnesoat accent and she did not pick up on it? Did his use of words not seem odd to her? Think trash can/garbage can, soda/pop/Coke, sub/hoagie/grinder, etc.
4. Do people tell you that you have an accent, yes they do, but only if you are not from their area, or you moved away and came back to visit and now you have a new accent.
Tina speaks at about 1:30 in the below clip. There are other interviews of her out there too. She has an accent, but I can't place it. Point being, almost everyone speaks with some sort of accent, but if you're used to them, you don't always pick up on the accent because it is normal everyday speech for you.