Infamous America Podcast
It is a good podcast, but it is heavy on Himmelsbach, and includes a few of his factual errors, such as Cooper sitting in seat 18-C.
There are actually four segments to the DB Cooper section. The fourth episode is a conversation between the host and the writer, and it reveals the depth of their research, which was extensive. It also shows their perspective on how they got interested in the case, which I found interesting.
The production gets more interesting in Episodes 2 and 3, the latter especially, as they work in more material, such as Tom Kaye and the Citizen Sleuths.
As for most podcasts, I found it enjoyable to be doing something as I listened. In this case, I grouted some of the tiles of the trailer and watched the snow come down, again. Whew.
BTW: They give a nice shout-out to Darren and his Cooper Vortex.