>> the goal, to use less force as possible. how an officer could change tactics. >> maybe the better way to change is a little wrist and elbow control. when you have the wrist elbow, it's not easy. if i take your center of gravity with me, then you're going to move. >> reporter: one tactic being considered, bringing in a female officer or a suspect's mother to diffuse a confrontation if possible. also part of new york's train, how to keep egos and adrenaline in check to avoid confrontational scenarios like this one in ferguson. >> bring it. [ bleep ] bring it. >> what we're teaching them is how to control that anger and how to channel that anger so they don't act out. >> it's all part of the learning one crucial principle. >> sometimes you turn your hands over, it's a more open position.