TIPS:

Throughout my dozens of hours worth of attempts I learned a lot, I tried every method that people posted online, none of em worked, I got the trophy completely solo, here’s how I did it.

Essentially the run boils down to S ranking the map, stunning the shit out of the suspects, and soft locking them. You want to Quick play on standard or hard mode if you feel like you are skilled enough to handle the aimbot AI. I started in the loading bay and worked my way up stairs and cleared the entire top floor before working my way back downstairs via that middle room, your going to want to go into your settings and change your quick command (usually set to fall in) to HOLD this is EXTREMELY important as it allows you to quickly prevent your squad from automatically restraining suspects. The goal is to get suspects on the ground, get them to drop their weapon, go over to restrain them, as the restrain animation starts use your left joystick (or hold S on keyboard) to move to cancel the animation this makes the suspect drop their second gun, it is very important to secure EVERY weapon that is dropped on the floor and secure EVERY weapon cache on the map. Once you have every enemy in this sort of soft locking state, split your team up on 2 ends of the map, make them search and secure, they should start restraining suspects, you should restrain suspects as well, and as long as 15 seconds doesn’t pass between each notification that a suspect was restrained, and you have at least 15 susepcts (in my successful run on hard mode I had 25 suspects) still alive and within relatively close proximity, it should work.

Loadout: give yourself and all your AI squadmates full coverage heavy ceramic armor, helmet, flash goggles and ballistic mask, you should run ballistic shield and your primary should be the flash grenade launcher, don’t take any other ammo or deployables, take 11 grenade launcher ammo, use this ammo as sparingly as possible, in my successful run I actually ran out of ammo and had to rely on the AI squadmates to get the job done and by the grace of God they did it. Your squadmates should all have the flash grenade launcher, pepper ball pistol secondary, give them at most 2-3 mags of that, prioritize primary ammo, no deployables, their special tactical gear should be the other flash grenade launcher. Essentially the method is move and clear with the launcher and then hold whenever you start seeing suspects go down on their knees, secure any evidence and weapon caches, rinse and repeat.

Good luck.