An LEO can see it anytime they have access to the database and a justifiable reason for the search.
99% of traffic stops consist of a registration check, a license check, and a warrant check. On a rare occasion an officer might access MD Case Search (the same one open to the public) and that's about it.
But that won't stop people from thinking that every stop officers are checking to see if someone has a handgun permit. Tin foil has no limits. It's amazing some here even leave their mothers basement.
Not disagreeing on the LEO can ask any question they want.
I am surprised (okay not really), That Maryland is lumping gun owners in with criminals.
What public safety requirement is fulfilled in knowing a non-criminal background check was run on someone at any given time in the past?