Vendee;
Were the other crew members qualified to comment? Would a police observer question the actions of a very experienced pilot?
Absolutely!
I didn't know the observers personally, but I'm sure that every qualified police observer would say something about what was going on. I know ours would. This is actively encouraged throughout their training, currencies and checks, despite what anyone may think about the single pilot aircraft and operations etc.
Every person qualified to fly in an operational police aircraft is current with CRM training and these warnings and cautions simply wouldn't be ignored.