From the parking garage head straight down the hall and go through the first door on your left to find the firing range.
Resident evil 2 locked door parking garage.
Next to the magazine is the police station map b1 along the wall but the elevator controls room is locked by a diamond door.
For resident evil 2 on the playstation 4 a gamefaqs message board topic titled parking garage locked door.
Return to the parking garage and inspect the car key and look on the other side for an unlock button you can press which will pop the trunk of a nearby patrol car to the left of the door you.
Be sure to check the elevator itself for a small note then head back.
Grab the equipment disposal notice and the box off the table on your right.