Police sergeant testifies at the Derek Chauvin trial

Police Sgt. Ker Yang leads the crisis team at the Minneapolis Police Department.
11:23 | 04/06/21

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Transcript for Police sergeant testifies at the Derek Chauvin trial
Now. Exited his. 203. Which we won't publish it this time contains some training records. In those training records indicate. That crisis intervention training was offered. Who thinks that 2016. And also 2018. And I'd like to talk to you about the larger block the 2016. Blocks. Now first I have to ask you do you know that you recognize the name Jared children. Yes how do you recognize. I resident named dirty children through training. You're familiar with this person. No would you recognize if you saw yes all right do you see in the courtroom today. He has a mask on her you know I'm assuming that's him. Amid record that reflected the witnesses identified. Record also reports. Exhibit a to a three training records indicate that in 2016. To defend that. Participated. In any link here course approximately a forty hour course crisis intervention training. Are you familiar with that type of course the forty hour crisis intervention training course. Yes Ed is out of course that you personally participated in as a student. Wasn't sooner into the departments to deal I'll satisfy a need associates he's. News chp officers association. And can you can just in general terms explain what that course covers. There wasn't car is Tom individual in crisis symptoms. And he escalation strategy is to MTV news forward in human crisis so it's a scenario based training. The trainer me necessity officers association brings in professional actors. To command and two. To. And our crisis scenarios where there in the state of crisis and you know officer asked to use the we have you DST strategies. To bring him down to pre crisis levels and help them. And so he officers are given an opportunity to practice recognizing. What may be signs of persons in crisis and respond appropriately. Yes. I'd like to retire to you about. Related concept you familiar with seeds critical decision making model. Yes you how are you familiar with that model I had intended to. The critical decision you make you motto was. Introduced to us by the police police executive research forums I along with some our colleagues we have tended to be treating. Session that was conducted by representative from her old please exactly we should forums. And we attacked stated that motto to him he's used to dial officers. And it is usually can process. Then does the critical decision making model. Is there an application to crisis intervention. Yes he does also an application to use of force yes and sometimes those decisions have to be made contemporaneously. Charity begins. Approximately two publish. Exhibit 276. The critical decision making model. You recognize this document. Yes and this is very critical decision making model with which you're familiar yes. Could you please explain. He's in your familiarity with us this GrafTech the middle circle. The medals are grown what he's seen them doesn't go our voices neutrality and respect and trust. Dole's all the pillars of procedural justice that was introduced to the department. What is procedural justice procedural justice basically is the legitimacy in our action. What what we do our part actual legitimate and that is what procedural justice filed its legitimacy. Can do this. The training center also offers courses. Procedural justices wells that right Venezuela and yes this critical decision making model is adapted in part from those materials the procedural justice materials. President gives me. No I'm going back to the outer part of this circle. The first half of information gathering you see that it goes cannibal we'll that's supposed to represented. Critical decision making or thinking as Aaron. Would you please we've heard a little bit about this. Critical thinking decision making model already but it I'd like you to discuss how this works in the context of crisis intervention. That started with the first cell block. Some of. Problem is information gathering we believe that this model has application not only for crisis especially for crisis that is why it is part of crisis program. And the person I'm circle what you see here is information. And information guys view crucial to power. What tactics so what decisions when made any information gathering community based on dispatch partly based on it'll home officers. Observation. Observations of what population. Seen observation the president of the observation arm as corn not so. And some of these observations. For example just be physical observations right officer could look at the person and make some sort of assessment. As to whether or not there's behavioral crisis news. Listening does that also important lessons and war news any other information that an officer went. He generally assess your team again when considering whether a person as a crisis. You men. Listening. For the city's key. Paula observation even touch for example have you officer it hands on the present you can sometimes since tensing now. And you can tell me because housing prices are not so. Then going to the next step taking that information and again. Potentially assessing it what's three reps to threat risk assessment plot. Marisa is the possibility of something bad and dangerous thing happened and threat and a sense is that danger and whether that news is we call Harmon not. How. Which. Risky since the potential right so it doesn't necessarily mean that the person is being threatened or themselves is threatens outright that is yes this is the mere possibility and many people could present some sort of where everybody present some sort of a risk pregnancy. In its up to the officer in the information gathering to determine. Whether that risk is small larger elevates what threatened. Most sustained. And how does he apologize your. How does the officer then assess whether or not a threat I'm sorry a risk is small large war. Could develop into a threat. That is our duty officers and different town of circumstances it information they have. At that time. Then the next step that after the threat or risk assessments. Authority to act could you please describe how that step is taken in the context crisis intervention. He'll soar into the act is based on all policy also based on C statues in caves thought to who individually in crisis. And also some of the Oakland we have in hand people in crisis. Some of those. Policies in the authority could include the use of force policy. Yes the yes. The next step then goals and actions. Please describe. The thinking model in terms of crisis intervention regarding goals and actions. Goal is an action is. Yeltsin contingency. Based on the information we can really get ultimate goal in actual summit in a crisis is to see that person needs help and what kind of power. Does that present regional hospital what does person can be. High turnover for somebody that has the authority to watch or that person. Seoul is lead you to go for somebody crisis he's determined to see that person needs help. And then the next block in terms of crisis intervention review and reassess. Could you please describe how that works in this scenario. Review and we assess this as information becomes available we continuously review and reassess the situation. To see if our technique on the escalation or are the technique is what he's not working and we have just a technique. No studies. Did did you also they go backwards and adjust your goals and actions yes again. Don't for example. Initially the goal is to arrest someone. After taking in information if you do to determine the person needed medical attention could you act on that. Yes and then it won't action beyond the personal isn't needed medical attention. I don't believe me go loss if somebody's hammer protections that we give him medical attention. And then that would also related to leave backwards in the authority to act is right here is. Looking out the policy and there's a duty to provide medical attention in the policy right here's. How is this critical decision making model. Imparted to Minneapolis police officers in the training program. We believe in keep application of this critical decision we can morals. Sorry introduce. This moral. With the approval of course into the department in 2000 AT. End. You know you've been in the situation where you've had to use force before you're in the field for a long time. Do you have an assessment as to whether or not this model is useful in the field. I believe me it's useful that is why we introduce Islam and and he was into the offices. And isn't practical it is about the it is two goals and he can you explain. How so I mean at some of these situations. Involving police officers occur. Fairly quickly separate. That is your news and possible for. Police officers who use this critical thinking model in the field. When actions are necessary when when events are unfolding quickly. It is possible. The readers will be using this model who almost the united bomb bomb could be on the site memory. And she won't talk about fast evolving situations I know they're there they do exist and you happen. A lot of time and we are converse of that is that a lot of time. We have to tie.

This transcript has been automatically generated and may not be 100% accurate.

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