Mackenzie has been an officer for 6 years, all with the Minneapolis Police Department. She worked in human resources before that.
Offcier Mackenzie trains in medical support, including CPR.
Mackenzie talks about CPR training, says if the subject doesn't have a pulse that CPR should begin immediately.
Defense cross examination begins.
Defense attorney Eric Nelson asks Mackenzie if CPR could be stopped due to outside factors making the situation not safe.
“That would be reasonable,” she said.
Mackenzie is talking about fentanyl and its dangers, and says she has seen use of it increase.
Defense is asking Officer Mackenzie about Narcan training.
Also asked Mackenzie about the medical condition: excited delirium.
She says, usually, illicit drugs are a contributing factor in excited delirium. #derekchauvintrial
In defense cross examination, Officer Mackenzie says rendering aid to a person can be distracting/difficult if there are environmental concerns. "If you don't feel safe... it's very difficult to focus." Says getting out of the situation is sometimes best.
Officer Machenzie has been excused for the day, but the defense will be calling her back for its case later, likely next week.
Court is in a short break.
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Before testimony began, Eric Nelson, the attorney for Derek Chauvin, noted that the state intends to call Andrew Baker, the Hennepin County medical examiner who performed the autopsy on #GeorgeFloyd, tomorrow.
First up today is Dr. Martin Tobin, a physician in pulmonary critical care.
He defined pulmonology as "the study of the lungs...of all diseases that effect the respiratory system."
He is being questioned by prosecutor Jerry Blackwell.
Nelson: Doesn't "saying things like 'you're a f***ing p****, you're a b****" convey a particular intent?
Stiger: "I wouldn't say intent," adding it depends on the officer's training. | cbsloc.al/2PziOKt
Nelson calls up surveillance photo outside Cup Foods. Asks Stiger about Chauvin's position, and could that indicate less of his weight on his left side, where his knee is holding down Floyd. Stiger affirms.
Prosecution's Steven Schleicher begins redirect of witness Jody Stiger by asking about the risks of positional asphyxia, making a distinction between positioning as opposed to pressure and weight.
Day 8 of testimony in the #DerekChauvinTrial continues this morning with Sgt. Jody Stiger, a use-of-force expert from the Los Angeles Police Department.
Officer Stiger has been with the LAPD since 1993, and has worked with homicide and gang units. Has extensive experience with use of force reviews.
Officer Stiger, the state's expert witness, has reviewed all body cam footage, other videos including cell phone videos, reports, manuals from MPD, and training materials in his review of the May 25 incident.