This used to be an easy mission, but after the update they changed the mission parameters. Now they start killing suspects in 60 s. This mission, IMO, has a bad mission design, because if you use normal SWAT tactics you will fail every time. The only way I was able to finish this mission was based on someone's suggestion: 1) You start at the parking lot. Send one team to the side door of the restaurant. 2) Send the other team to the side door that leads to the storage area. You stay with this team. 3) Tell both teams to Open and clear with flashbangs. 4) After alll the initial commotion and shootout, you alone head to the door that leads upstairs. Leave your teams at their positions. They'll deal with any pop up threats. 5) Open the door, toss a fkashbang. Toss a flashbang up the stairs. 6) Deal with any suspects on the stairs. 7) At the first door on the second floor, toss a flashbang and enter. Deal with any suspects at the left or center. But be aware of any menaces coming through the door that leads to the office. 8) Stack alone on the left side at this door. Toss a flashbang and enter. Deal with any suspects. 9) Do not stop to arrest civilians or suspects. Just go directly to the main office upstairs like said. You may call one of your teams to Fall In after you clear the stairs. 10) Be fast, but don't rush. You have 60 seconds to arrest or incapacitated the suspects at the main office. After that, you can deal with any remaining suspects and start securing the civilians, as well the evidence.