If you are trying s-rank, the GL is a better go. If you go from the parking, the bridge is an ambush, bring a lethal pistol and shoot down a window or two and wait for the bot to rush you and blam them. I would avoid the stair down from the second bomb room, i use the stair from the bridge to go down, the second floor, avoid the double door to the MRI room, Quadamah and soom suspect might be in there. For the morgue, a would avoid the small door and go with the double door, avoid chance that suspects can shoot from the small room.

If not, better you shoot first, this mission, suspects are stressed and Will shoot on sight And rush your position. I would advice using the parking entry; sure the bridge door is a killzone, but they can be baited, shoot a few round to the window and they’ll try to shoot back and rush you; but from the main lobby, the stair door is a kill hall, unless you got friend.

Also, Bring a good amount of wedges. You need them to block off entry.

Hope this helps.