Huh.

Here’s a Popular Mechanics article that’s exactly one year old: A Secret Parachute in the FBI’s Possession May Have Finally Solved D.B. Cooper’s Identity

And here’s the FBI’s web page over it, which notes they diverted resources to other investigations in 2016, but specifically names McCoy as a suspect: D.B. Cooper Hijacking

As far as updates go? I only have sardonic comments about what the FBI is to these days. But I don’t think they are going to work on this one anytime soon.