There was a mod for GTA IV which lets the player add a siren to any ground vehicle with a simple keystroke. I wish someone would do this for GTA V.
BTW I added this question to an older forum thread some days ago but an admin told me it's against the rules. So here it goes as a new thread.
I installed lejs yesterday and tried to add the campus patrol as shown in the video. However, there is no blip at the desired position, I have never seen any police patrolling there and oh, while I'm at it, I have not a single red dot in the master view. Here is the ini-part for the campus patrol (i have not touched the rest of the ini):
[CampusPatrol]
X=-1610,652
Y=170,1925
Z=59,36016
Heading=206,0
Patrol Area Size=80
Peds Spawned in Vehicle=True
Patrolling=True
Ped Model 2=s_f_y_cop_01
Spawn Chance=100
Shift Start Time=00:00
Shift Stop Time=00:00
Officer1 Weapon=stungun
Officer1 Equip Weapon=True
Officer2 Weapon=stungun
Officer2 Equip Weapon=True
Officer1 Ambient Action=Smoking
Officer2 Ambient Action=Phone
Vehicle Invincible=True
Keep Vehicle Clean=True
Keep To Spawn Street=True
Ambient Event Chance=25
Ambient Event=Pullover
Emergency Vehicle=POLICE
Ped Model 1=s_m_y_cop_01
Sirens Active=False
Vehicle Blip=True