Magistrate Judges are commonly on 24-hour staffing in many counties, and big cities, or at least on stand-by. All an officer need do is make a quick telephone call, swear to the facts of the case and a warrant is signed. It need not be transmitted by bicycle messenger to be in LE hands for them to force entry if required. Officers had RAS of a crime (bullet holes) and Probable Cause of a felony (use of a dangerous weapon) dead-bolting the door would only have resulted in the destruction of the door's frame that she would be responsible for repairing (.... after she had been bailed out of jail and had her house left open to anyone who happened by as it's not like the officers are going to station a car outside to watch it.)
As for the voluntary blood-alcohol test, the officers had all the evidence they needed for a warrant requiring a non-consensual blood draw. So she saved herself a pin *****, nothing more. DUI for private vehicles is .08 but with pleasure boats or commercial vehicles it is .04... any guesses which is enough to be 'under the influence' when operating a deadly weapon?
Regarding the "Second-degree recklessly endangering safety - "Whoever recklessly endangers another's safety is guilty of a Class G felony" charge? Not even Johnny Cochran or Perry Mason is going to be much use there.