Coming from a night owl interested in chronobiology ))) Being nocturnal is not the sign of a criminal mind. 9% of us are nocturnal. 13% are skylarks, and the rest are scattered amidst four distinct, but different sleep patterns. Rather, and it is my own theory, if nocturnal people have to adjust to a totally different lifestyle, and the problem is being pushed to wake early, it might eventually contribute into depression.
OTOH, sleep disorders are a thing and are associated with several different conditions (some of them neurological).
Sounds like BK remained nocturnal, according to two neighbors at Steptoe. IMO.
And on the topic of ID cards in the glove compartment, during my time at the police academy, I became convinced to follow the advice of all the commanders, captains and lieutenants: do not put any needed documents in a place you don't wish LE to search. Since I keep a self defense item in my glove department (not a gun), I do not want to have to open my glove box, because so doing can and does give LE the opportunity to search it.
Their advice was to keep it someplace where you don't have to reach inside any concealed compartment, as that makes officers nervous. They suggest clipping it onto the visor - which is what I now do. I keep my insurance cards in a tiny holder that attaches to my key chain - so that if I'm ever stopped, my hands will be always visible and I will not be leaning to open a concealed space.
I live in SoCal. And I've been stopped in two states merely for being out of state, IMO. At any rate, I'm always glad that my stuff is at hand, that I can indicate easily to the officer where my hands are going, etc.
All my opinion, based on LE advice.