I’m a retired detective and I’m been on many many fly trips to pick up suspects I obtained an arrest warrant for who fled and were captured in another state. When I fly armed the pilot and the rest of the crew are always notified preflight of who I am and where I’ll be sitting (in the back if with prisoner). I’m also told if there’s an air marshall or anyone else flying armed on the aircraft and where they are sitting. I’ve been on dozens of flights out of many major airports including JFK, LaGuardia, Newark D.C, etc. in my career during my official duties. Only twice was there an air marshall on board.