and you also heard nicole mackenzie talk about this. consider nicole mackenzie's testimony. as far as the reasonable police officer, which would include nicole mackenzie, she discussed at length the difficulty of performing cpr in what she would describe or did describe as a hostile environment. you miss signs. you -- agonal breathing can be confused for effective breathing. as she testified, people in the area can affect the decision to treat a subject at the scene. she described how it is incredibly difficult to perform ems empties in a loud crowd. difficult to focus when you don't feel safe. makes it more difficult to assess a patient. makes it more likely you can miss signs a patient is experiencing something. so the distraction she said can actually do harm to a patient. when we're talking about this critical decision-making model, right, as lieutenant mercil said, he testified sometimes you have to take into consideration whether it is worth the risk to remove the handcuffs and render medical aid. because it's unpredictable, right? all of this information is coming at

. >> nicole mackenzie. >> mr. nelson. >> good morning ms. mckenzie. officer, i apologize. you previously testified in this case, correct? >> i have. a. >> to refresh the recollection, whatat is your role again with e minneapolis department? >> the medical support coordinator for the department. >> and in terms of -- can you put your mask down? >> yes, sir. >> thank you. >> in terms of the training that you provide to officers, is it fair to say that the training consists of both academy training and veteran and officer training? >> yes sir. >> in terms of the training that your department provides, does your department provide excited delirium training to officers in the academy? >> in the academy, yes. >> that's not something that is routinely given. >> correct. >> now do you understand that officers lane who is a part of the case recently attended the academy. >> yes. >> and he would have seen the materials that the minneapolis police department provided relevant to excited delirium. >> yes sir. >> you had an opportunity and reviewed the powerpoint presentations in that

nicole mckenzie talk of us consider nicole mackenzie's test. as far as the reasonable police officer which would include nicole mckenzie she discussed at length the difficulty of performing c.p.r. in what she would describe as her she did describe as a hostile environment you miss science you agonal breathing can be confused for affective breathing and she testified people in the area can affect the decision to treat a subject at the scene she described how it is incredibly difficult to perform and m.s. efforts in a loud crowd difficult to focus when you don't feel safe makes it more difficult to assess a patient makes it more likely that you can miss signs that a patient is experiencing something so the distraction she said can actually do harm to a patient and we're talking about this predictable decision making model right as lieutenant marshall said he testified sometimes you have to take into consideration whether it is worth the risk to remove the handcuffs and render medical aid because it's unpredictable right all of this information is

. >> reporter: and jurors may hear again from the prosecution's witness, officer nicole mackenzie, as the defense tries to make the case that bystanders distracted chauvin. >> it's very difficult to focus on th patient while there is other things around you if you don't feel safe. >> we have seen the videotape. we have seen remarkable civilian witnesses and expert witnesses, but there is still a battle brewing. >> reporter: a battle the entire nation is watching >> and megan is with us megan, the big question, will derek chauvin himself take the witness stand? >> reporter: kate, legal analysts say it is not likely because the scope of cross-examination is so broad taking the witness stand would open chauvin up to questions about past police conduct complaints as well as potential instances of prejudice and bias kate >> all right, megan. thank you. >>> still ahead tonight, an nbc news exclusive. a congressman opening up for the first time about his mental health struggles after the january 6th u.s. capitol attack. >>> also, how the pandemic may be making your seasonal allergies better

in the again we were hearing the testimony of nicole mackenzie a medical support coordinator for many athletes police she's been cross-examined by the defense in the trial over there and show than charged with the murder of george floyd. a lot of the thrust of the questioning right now over. i suppose the question all or as we saw they're being called that now looks own and narcan. basically today the defense. very much trying to focus on the idea that drug use could have been one of the main causes of the death of george floyd so the use of force really and how police officers should try to deescalate crisis situations has been the focus of today which is the 7th day of evidence in the trial of former minneapolis police officer derrick chauvelin think we can go to allan fisher who is an island isn't there just yet we are seeing a short break. in court proceedings. that's also for the defense will on tuesday expert witnesses outlined the force's procedures including the fact that all minneapolis police officers were trained in dealing with a crisis so shoguns defense team as previousl

officer nicole mackenzie, a medical response coordinator with the minneapolis police department outlined the requirements for officers that include cpr on individuals in cardiac arrest because he said officers are required to administer to anyone in distress or critical state until paramedics arrived. george floyd repeatedly begged for his life that day saying he couldn't breathe there is possible. you know, there's a possibility that somebody could be a trade. this for us and still being able to verbalize it. >> just because there are speaking doesn't mean they're breathing adequately. also testifying today use of force instructor with the minneapolis police department who told the court that part of an officers training involves exposure to various use of force defensive techniques that can be used in combat situations with the suspect. lieutenant johnny mercil confirmed children received this training and in a blow to the defense said a neck restraint on a handcuffed and controlled person isn't considered acceptable use of force. but during cross examination, the defense deflated thos

. >> reporter: officer nicole mackenzie coordinates medical support services for the department. prosecutors using her to counter the defense argument chauvin wouldn't have known floyd was in distress because he was still talking. >> there is a possibility that somebody could be in respiratory distress and still be enabled to verbalize it. just because they're speaking doesn't mean they are breathing adequately. >> reporter: the defense team argues the crowd that gathered around the officers created a distraction and a threat. >> have you ever had to perform emergency services in a -- not even a hostile crowd, just a loud, excited crowd? >> yes. >> is that, in your experience, more or less difficult? >> it's incredibly difficult. >> does it make it more likely that you may miss signs that a patient is experiencing something? >> yes. >> reporter: nine minneapolis police witnesses have already testified against chauvin, including the department's chief, medaria arradondo. today, floyd's family praying outside the court, closely following every second of the proceedings. his brother

has lined up >> reporter: and jurors may hear again from the prosecution's witness, officer nicole mackenzie as the defense tries to make the case that bistanners distracted chauvin >> makes it very difficult to focus on the patient if there are other things around you if you don't feel safe. >> we have seen the videotape. we have seen remarkable civilian witnesses and expert witnesses there, but is still a battle brewing. >> reporter: a battle the entire nation is watching the big question is will derek chauvin take the witness stand legal experts say it's not likely because the scope of cross-examine is so broad. taking the stand opens him up to questions about past police conduct complaints as well as other potential instances of prejudice or bias. frances? >> meagan, thank you >>> let's turn now to breaking news out of minneapolis. hundreds of protesters marching in the streets and demanding justice as a man is fatally shot by an officer in brooklyn center, minnesota. the crowds were dispersed by what looks like tear gas the neighboring police department in brooklyn park said their front

>> no, sir. >> reporter: the defense seizing an opportunity during testimony from nicole mackenzie, aical support officer for the minneapolis pd, to make its case that the crowd gathering around the incident was a distraction and a threat keeping chauvin from rendering aid. >> have you ever had to perform emergency services in a -- not even a hostile crowd but loud excited crowd? >> yes. >> is that in your experience more or less difficult? >> it's incredibly difficult. >> reporter: and the defense arguing narcotics like those found in floyd's system could make a person stronger and more difficult to subdue. >> they might have what we call superhuman strength. they might be able to lift things they wouldn't normally be able to lift. >> reporter: and the prosecution also brought in an outside expert, a sergeant with the los angeles police department who testified he also found chauvin's actions were excessive. he is due back on the stand when the trial resumes later this morning. michael? >> alex, one eyewitness wants to invoke his fifth amendment rights and refuse to testify. >> repor

. >> nicole, nicole, last name mackenzie. >> thank you. good morning. >> good morning. >> officer. >> officer. i apologize. i'm sorry. >> you previously received in this case. correct? >> i have. >> and just to refresh the jury's recollection, what is your role again with the police department? >> i am a medical support coordinator for the department. >> okay. and in terms of -- >> could you take your mask off? >> yes, sir. >> thank you. >> in terms of the training that you provide to officers, fair to say that the training consists of both academy training and veteran officer training called in service? >> yes, sir. >> and in terms of the training that your department provides, does your department provide excited delirium training to officers in the academy? >> in the academy, yes. >> and that's not something that routinely is given to the veteran officers? >> correct. >> all right. now you understand that officer lane who is a part of this case recently attended the academy? >> correct, yes. >> and he would have seen the materials that

. >> nicole mackenzie. [inaudible]. >> can you tell us how you are currently employed pretty. >> i work for the criminal and laboratory pretty. >> so you are a scientist and forensic scientist pretty. >> i am a forensic scientist, yes pretty. >> can you describe your educational background. >> have a university of north dakota and i have a masters from george washington university. [inaudible]. >> we did you achieve your bachelors of science agree and forensic scientist pretty. >> 2007, from the university of north dakota. >> you said that already. and so you earned a masters degree as well and where you get that front, george washington. and what jarvis that pretty. >> 2009. it. >> so kind of things you have to do to get a masters in forensic science pretty. >> the coursework included criminal justice coursework, law courses, a lot of hands-on applications with forensic practices and my concentration was in molecular biology so there's a lot of coursework dedicated to dna testing. achieved your bachelors d

nicole mackenzie testified that officers are required to administer medical aid. on cross-examination, she supported reasons why that might not occur. >> if you're trying to be heads-down on a patient, you need to aid to, it's very difficult to focus on the patient while there is other things around you. if you don't feel safe around you. >> does it make it more difficult to assess a patient? >> it does. >> does it make it more likely that you may miss signs that a patient is experiencing something? >> yes. >> and so the distraction can actually harm the potential care of the patient? >> yes. >> court will resume today with sergeant jody stier who testified yesterday that chauvin's use of force was escalating. we will be covering that all day here on msnbc. >>> still ahead here, major league baseball confirms this summer's all-star game will be held in denver, after the uproar of georgia's new voting law. >>> amazon founder and ceo jeff bezos voices his support for a new infrastructure plan including a corporate tax rate hike that would help pay for it. we will ha

officer nicole mackenzie, a medical response coordinator with the minneapolis police department outlined the requirements for officers that include cpr on individuals in cardiac arrest because he said officers are required to administer medical aid to anyone in distress or critical state until paramedics arrived. george floyd repeatedly begged for his life that day saying he couldn't breathe. there is possible you know, there's a possibility that somebody could be in respiratory distress and still being able to verbalize it. >> just because there are speaking doesn't mean they're breathing adequately. also testifying today use of force instructor with the minneapolis police department who told the court that part of an officers training involves exposure to various use of force defensive techniques that can be used in combat situations with the suspect. lieutenant johnny marshall confirmed children received this training and in a blow to the defense said a neck restraint on a handcuffed and controlled person isn't considered acceptable use of force. but during cross examination the defen

officer nicole mackenzie, a medical response coordinator with the minneapolis police department outlined the requirements for officers that include cpr on individuals in cardiac arrest because he said officers are required to administer medical aid to anyone in distress or critical state until paramedics arrived. george floyd repeatedly begged for his life that day saying he couldn't breathe. there is possible. you know, there's a possibility that somebody could be a trade. this for us and still being able to verbalize it. >> just because there are speaking doesn't mean they're breathing adequately. also testifying today use of force instructor with the minneapolis police department who told the court that part of an officers training involves exposure to various use of force defensive techniques that can be used in combat situations with the suspect. lieutenant johnny marshall confirmed children received this training and in a blow to the defense said a neck restraint on a handcuffed and controlled person isn't considered acceptable use of force. but during cross examination, the defens

on tuesday, a minneapolis police officer, nicolle mackenzie, may be recalled by attorneys. nbc's meagan fitzgerald joins us outside the courthouse. >> reporter: lindsey, we know the defense will be calling witnesses that will be helping them to prove their case that george floyd died of an overdose from his preexisting conditions and that the crowds that jurors saw in that video impacted derek chauvin from rendering aid to george floyd. it's likely we'll hear from a medical examiner from maryland who legal experts say will be used to poke holes in the autopsy report. we'll be hearing again from a minneapolis police officer who was called by the prosecution. and i want to play for you a little bit of the exchange in court from her last week. >> if you're trying to be heads down on a patient that you need to render aid to, it's very difficult to focus on that patient while there's other things around you, if you don't feel safe around you. >> and so the distraction can actually harm the potential care of the patient? >> yes. >> can the activities, though, of a crowd, the acti

remember nicole mackenzie's testimony too as unreasonable as it sounds, paramedic get attacked, too.rce. we have all of the opinions of seth stoughton, jodi sachar, barry brodd, redondo, lieutenant mercil, and they all reach very different conclusions about when the force became unreasonable. —— jodi about when the force became unreasonable. ——jodi stiger. all you have to know... -- all you half to know _ all you have to know... -- all you half to know about _ all you have to know... -- all you half to know about barry - all you have to know... -- all you half to know about barry brodd i all you have to know... -- all you half to know about barry brodd is| half to know about barry brodd is managing any person. his opinion is you can use nondeadly force to physically manage a person. —— all you have to know. it is all within the model of the mpd decision—making model. ifound the most the model of the mpd decision—making model. i found the most interesting person to be relevant to the use of force lieutenantjohnny mercil considering that he is derek chauvin's actual use of force traine

you will, for example, hear from nicole mackenzie, the medical support coordinator for the minneapolis police department. she will tell you that the dangers of the prone position have been known about in policing for over 30 years and they train officers on it. she will tell you that arrestees, citizens that are under arrest should never be put in the prone position accept only momentarily to get them under police custody or control to get handcuffs on them. but never left in that position. you will learn mr. floyd was in handcuffs already so they didn't need to put him on the ground to get him into, to get him under police control. and she will tell you the reason that you don't put persons in the prone position to that way, let alone with a man's body weight on top of them, or for nine minutes 29 seconds, the reason you don't is because of the potential to obstruct the airways. .. >> that are above areas of the shoulder, spinal column, on the neck, on ahead. to do that is using deadly force because if you are putting pressure on those areas, even the risk of seriously injuring the pe

. >> officer nicole mackenzie, the medical coordinator for the minneapolis police department was askedut this moment. >> i can't breathe! >> you're talking fine. >> just because they're speaking doesn't mean they're breathing adequately. >> the defense asked mackenzie if the crowd could have distracted chauvin, a central point in their case. >> it is very difficult to focus that patient while there are other things around you. if you don't feel safe around you. >> ben crump, one of the floyd family attorneys said he has never seen so many officers testify against another. >> it is our hope that that will become the norm when police see things that are wrong or violate policy that they would tell the truth. >> thank you. we love you all. >> floyd's brother rodney was at a midday prayer service outside the courthouse. >> all shades and ethnicities that are responding and replying and reaching out to us saying they feel our pain. >> reporter: today that l.a.p.d. expert will be back on the stand and likely to face an aggressive cross-examination, while mackenzie was called by the prosecuti

and officer nicole mackenzy, an emt and the department's medical support coordinator testified officersation, she pointed to reasons why that might not occur. >> if you're, you know, trying to be heads down on a patient that you need to, you know, render aid to it's very difficult to focus on that patient while there's other things around you. if you don't feel safe around you. >> does it make it more difficult to assess a patient? >> it does. >> does it make it more likely that you may miss signs that a patient is experiencing something? >> yes. >> and so the distraction can actually harm the potential care of the patient? >> yes. >> joining us now from minneapolis, nbc news correspondent shaquille brewster. good to see you this morning. we had yesterday another member of the minneapolis police department, this time a use of force instructor saying, this is not what we teach. the knee on the neck that we saw from former officer chauvin is not part of our instruction. it shouldn't have been used. this now falls in a line of members including the police chief who have said that officer c