This is something I've been toying with for a few years now. I love the idea of using scenarios to force people to think about what they are doing, for both the "law" and "criminal" side of things. For the law, acting in the interest of public and personal safety. For the criminal, knowing that if you do something dumb (like pulling a gun) it will likely get you shot and killed.
Nine years ago (2004) there was an event held in conjunction with the Forest Hill Police Department (Forest Hill, IL) wherein attendees had the opportunity to run through a number of different scenarios, ending with a battle against the Will County SRT (tactical team). The event was called Codename: Asylum, and the money raised went to purchasing training equipment (airsoft) for the police department so they could do practical training rather than dry training (if I recall correctly). I had contacted the group who put the event on, but it seems they have not had a similar event since.
These are the videos I used for inspiration while thinking about what types of scenarios could be run in an event:
Codename: Asylum (Felony Traffic Stop #1) -
OP: Asylum 4 (Day 2) Felony Car Stop #1 - YouTube
Codename: Asylum (Felony Traffic Stop #3) -
OP: Asylum 4 (Day 2) Felony Car Stop #3 - YouTube
Codename: Asylum (Felony Traffic Stop #4) -
OP: Asylum 4 (Day 2) Felony Car Stop #4 - YouTube
Newport Beach Citizen Academy 28 -
Citizen Academy 28 - YouTube
Newport Beach Citizen Academy 30 -
Citizen Academy 30 Fall 2011 - YouTube
There are literally LOADS of videos like this online, but these got the thought process started.
The challenge that always popped up in my mind was limiting the number of rounds and magazines that each person has on them. If you are acting/portraying a Detective or plain-clothes member, you are likely to only have one spare magazine (maybe two). Uniformed members carry two spare magazines, but generally no rifle mags or anything like that. Some people may not like the idea of such a limitation, personally I love it!
Bear in mind this is based on my experience with law enforcement in Manitoba, and could be different when compared to other larger departments.
Food for thought....