Transcript for Bystanders deliver powerful, emotional testimony at Derek Chauvin trial: Part 7
The calls for justice for George Floyd growing louder. The black man in Minneapolis dying after an encounter with police. His death causing national outrage. No justice, no peace! This video was powerful, and it became clear that not only is everyone in Minneapolis wondering what's going on, people all across the country and all across the world were trying to figure out what's going on in Minneapolis. Hands up! Don't shoot! Hands up! Don't shoot! In Minneapolis, the issue of officers interacting with people of color and having problems or using excessive force against people of color, I think, is very widespread. In the last eight years, they have taken in 3,434 complaints. They have disciplined 20 of them. And when the case is closed without discipline, the public never gets to learn what happened in that case and what sort of talk the officer had with their supervisor. I'm about to die. Relax! When Derek chauvin had his knee on George Floyd's neck, he knew that we have a culture of impunity in Minneapolis police department. Derek chauvin had about 17 different complaints lodged against him, but the detail of those complaints are really not We have no idea what they're about. They could be nothing or they could all be really serious and we don't know. I think it's pretty reasonable to suspect that there is some misconduct hidden within those complaints that were closed, no discipline. Back in 2013, lasean Braddock accused Derek chauvin and another officer of abusing him after a traffic stop. I was beat up and mistreated by Derek chauvin. I remember my face being on the ground and it was cold and it ground and it was cold and it was hurting. He had his knees on my head and Braddock is charged with failure to comply and obstruction of justice, but in the end, all those charges against him are dismissed. So I put a complaint in against him, hoping that something would happen. I don't know to this day if they processed it, if they reviewed it, or anything. Minneapolis office of police conduct review has no comment about the complaint. I feel like if they'd have took me seriously, then George Floyd might still be alive, you know? For over 20 years, we've operated a hotline and people call in with their complaints about police. On may 25th that evening I was just in my home and people started messaging me saying, you've got to see this video on Facebook. Get on Facebook. So I went up and I looked at the video, and almost immediately I said, that's Derek chauvin. I recognized him because we had gotten so many complaints about him on our hotline. Shauch is charged with second-degree manslaughter in the death of George Floyd. It's really hard to convince a jury that a cop committed murder. Even when you can see it with your own eyes, right? You're going to learn in this case a lot about what it means to be a public servant and to have the honor of wearing this badge. Here's what he's doing in this case. One, Derek chauvin caused the death of George Floyd. It's causation. And number two, his decision to put his knee on the neck was unreasonable. And they have to prove both of those things beyond a reasonable doubt. It's a police officer, so that's a really high burden, and they know it. Mr. Floyd at some point the completely passed out. Mr. Chauvin continues on as he had, knee on the neck, knee on the back. You'll see he does not let up and he does not get up. Mr. Chauvin is told that they can't even find a pulse on Mr. Floyd. You will see that he does not let up and that he does not get One of the defense's strategies was that Derek chauvin had been trained to do what he did, that the kind of restraint he kept George Floyd in was all part of what he had learned from the academy. You will learn that Derek chauvin did exactly what he had been trained to do over the course of his 19-year career. The use of force is not attractive, but it is a necessary component of policing. Erik Nelson told the jury that Derek chauvin did exactly what his training had taught him to do in this incident. Prosecutors pounced on that theory right away but bringing in the police chief to rebut that argument. That is not part of our policy. That is not what we teach. Once Mr. Floyd had stopped resisting, and certainly once he was in distress and trying to verbalize that, that should have stopped. It is not part of our training and it is certainly not part of our ethics or our values. We don't often see chiefs of police testifying against their own. We don't often see a police chief getting up there and saying, my officer in high stress situation didn't do the right thing. That is huge for the prosecution. So, the prosecution says, believe your eyes. The defense says, consider this other scientific evidence. And at the end of the day, the defense doesn't have to convince everybody. If even one juror thinks, well, maybe there's a reasonable doubt about that, they've won. As the defense is preparing to present its case, just 10 miles away, there is another incident, again with a white police officer, unarmed African-American man who ends up dead. Breaking news in Brooklyn center. A 20-year-old black man killed during a traffic stop.
This transcript has been automatically generated and may not be 100% accurate.