It happens nearly twice a year, a Chattanooga police officer fires a gun on duty. 

That decision is a life or death choice every time. There is no room for error. With the stakes so high, Channel 3 wanted to know what goes into making sure they are ready.

Pastor Kevin Adams of Olivet Baptist Church agreed to put himself in the shoes of a police officer for a few hours.

Assistant Police Chief David Roddy goes through a simulation; the scenario is a suspicious man lurking around a business.

"When I perceived the threat he's facing me like this, so when I decided, I perceived it, and I reacted to it, I went  through my loop, and I decided I needed to defend myself and I fired two rounds,” said David Roddy, Assistant Chief, Chattanooga Police Department.

The "loop" is called the OODA loop; an officer observes orients, decides and then acts. Training like this makes split second decisions easier, but never perfect.

Pastor Adams is working to bridge the gap between police officers and the inner city where he has a church.

He and I put on our police duty belt and learn about our simunition gun.

"When you get ready to deploy it, you are just going to simply do this thing, pull the trigger just like

that, there is not a lot of stuff to it,” said Ronald Zirk, Officer, Chattanooga Police Department.

Today's first scenario is a bank robbery, and this car may be the one carrying the bad guy.

"Driver please place both hands outside the window,” said Kevin  Adams, pastor, Olivet Baptist Church.

The suspect jumps out, he has a gun.

"I'm going to kill you,” said suspect.

Pastor Adams fires back.  In just a couple of seconds scenario 1 is over.

"So the question I would ask you is as soon as he got out of the car what did you feel?" said Ronald Zirk, Officer, Chattanooga Police Department.

"My heart, my heart," said Adams.

"As soon as he exited the vehicle, I seen your body it went like this, you kind of squatted down a little bit,” said Zirk.

"You kind of got a little bit lost in there and next thing you know the gun was being fired at you, and that happens constantly so you got to experience the OODA loop he was talking about, “said Sgt. John Monroe.

Scenario two, a woman calls police because her neighbor's door is wide open. Pastor Adams is the first officer on the scene and notices the man has a gun.

"Identify yourself, someone is coming in, oh stop sir," said Adams.

That man pastor Adams just shot was deaf, and was no threat, just cleaning his gun and never heard the orders.  

'That looked really bad on the news," said Zirk.

"Pastor of a church!" said Adams.

"You gotta fix that," said Zirk.

Adams, past critic of police tactics, has a new outlook. 

"I walk away from here with some different perspectives, a different appreciation for law enforcement and for what they do," said Adams.

During our training  Pastor Adams wanted to know, what role does race play when going through the OODA loop technique? CPD insists race is not a factor.

Adams wants to see more racial sensitivity training and more African American officers on staff with CPD.

Police want you to remember these three things if you're ever stopped.

1.  Follow their directions

2.  Keep your hands where they can see them

3. Do what you are told very slowly.