The RPD's Safety Deposit Room is packed with useful resources, but not all of them are accessible at first. To get everything in those pesky electronically sealed lockers, you'll need to get two replacement keypad keys. These can be found inside Pocket Safes scattered throughout the police station. To open a Pocket Safe, simply examine it and then input the correct button pattern. This require a little bit of trial and error to find out, but keep at it and you'll unlock it in no time. Below you can find details on where each Pocket Safe is located.
There are two safes in the RPD--one in the West Office and the other in the Waiting Room. Both yield valuable resources well worth grabbing. We won't spoil what's inside each here (spoiler: they're all useful items), but we will reveal how to open them. The safe solutions are found in memos scattered around the building, which we've detailed the locations of for all of you completionists out there.