Right now. This is nbc nightly news. Reporting tonight lester holt from North Charleston south carolina. Good evening. The shocking images of a man running away from police shot in the back have been seen by millions. The video very hard to watch and has left so many people asking why. And so tonight on this busy news day we are coming to you from North Charleston a city that has become the latest in a growing list of communities rocked by controversial cases of deadly force by police. But none quite like this. Well have extensive coverage including an exclusive interview with the witness who recorded that video in just a moment. But first, to boston. Two years after the bombing of the marathon killed and maimed among a crowd of innocent spectators these the faces of the three lives taken in that moment and the Police Officer gunned down after. Today, the surviving bomber Dzhokhar Tsarnaev was found guilty on all charges. The defense never disputed his guilt. And now their biggest fight comes next. Pete williams starts us off tonight from boston. Reporter lester good evening. The jury heard from 96 witnesses during a trial that lasted more than a month. But todays verdict came after just 11 hours of deliberations. Jurors declared a 21yearold chechen immigrant guilty of the worst act of terrorism in the United States since 9 11. Were obviously grateful for the outcome today. Its not a happy occasion but its something we can put one more step behind us. Reporter the jury found Dzhokhar Tsarnaev guilty on each of the 30 counts filed against him. For the marathon bombings that killed. And for the crime spree three nights later killing m. I. T. Police officer sean collier, carjacking a and shooting and throwing bombs at police in watertown resulting in the wounding of Police Officer richard don hue who nearly bled to death. Tsarnaev showed little response in court. Almost certainly expecting this verdict after his lawyers conceded he was part of the plot. The parents of Martin Richard hugged each other listening intently. Bombing victim Rebecca Gregory in texas with a new prosthetic leg says she hasnt decided what the right penalty should be. I do believe however he should be held accountable for his actions. And im very thankful for each of the jury members that are making him do that. Reporter even though massachusetts has no death penalty, this trial is in the federal system so it now goes onto a second phase with the same jury deciding whether tsarnaev should be put to death in the federal governments Lethal Injection Chamber in indiana or sentenced to life in prison most likely the supermax penitentiary in colorado. Convicting so quickly on 30 charges signals to me that the jury again we dont know signals to me that the jury might not be so hesitant to vote for the death penalty. Reporter but for now today was a moment of victory for many victims. I may be standing on one fake leg, but im standing here stronger than ever because someone tried to destroy me. And he failed. Reporter the judge has given the jury the rest of the week off. So the next phase of the trial on the penalty starts some time next week. Lester. Pete williams thanks. Among the injured that day in boston were brothers j. P. And paul norden who were gravely wounded in the second blast. Their mother sat down with us today with her reaction to the verdict. I literally saw my sons get blown up. I saw the fear in their eyes. You know like help me. It was awful. I want to see, you know what kind of a person could do this. He could have walked away. He stood there five minutes. He saw so many people. He could have walked away but he chose not to. Its just sad to see what some of those people have to deal with day in and day out. And, you know he didnt have a care in the world. Theyve accepted whats happened to th and they want to fully focus on getting themselves to their life back. I wish i could be as brave as they were. For me the mom of two boys that were hurt so bad and to see so many injured that day and see what they suffer and go through, and i solely speak for myself i want the death penalty. The real victims are the people you know that were down there that day and suffered. And the people that ran in to help instead of running the other way. They are moving on with their lives. Neither of lizs sons attended the trial. Both are now engaged. Now to the reason were here in south carolina, the other big story were covering tonight. The Police Shooting death of an apparently unarmed man. Its hard to watch but take a look at how the shooting unfolded as a witness recorded it on his cell phone. The deadly encounter between walter scott and Police OfficerMichael Slager began with a traffic stop for a broken taillight saturday morning at around 9 30. Officer slager fires a taser at mr. Scott, who runs away. A bystander with a camera caught what happened next. [ gunfire ] the officer then fires his gun eight times, hitting walter scott five times. Approximately 9 38 a. M. Officer slager radios dispatch. 221, shots fired. Subject is down. He grabbed my taser. Reporter he then walks towards a motionless walter scott. Put your hands behind your back. He handcuffs the man, jogs back and appears to pick something up. Another officer is now on the scene and Michael Slager drops something next to walter scott. Two minutes and 43 seconds after shots were fired, officer slager reaches down to check scotts pulse. In a moment well hear from that witness who recorded it all. But first we get the latest on a tense day here from nbcs gabe gutierrez. What do we want . Justice when do we want it . Now reporter today in North Charleston the anger boiled over. Black lives matter this has been a horrible tragedy within our community. Reporter the mayor announcing that officer Michael Slager has been fired after being charged with murder. Now, the city will also buy body cameras for every officer on the street. The contentious News Conference interrupted by protesters multiple times. No justice no peace reporter what police could not answer was why in the video slager retrieves an object that had fallen on the ground. Its not clear whether its his taser. And appears to drop the object next to scotts body. Also not clear why the video doesnt show officers performing cpr when the initial Police Report said they had. There are questions that i have in my mind that i cant answer right now. Reporter they are also questions that have haunted judy and walter scott since saturday. I said oh no and i dropped to my knees and started crying. Reporter the graphic video of their son too much to bear. I couldnt looking at it when i saw my child. My child, i saw him running like you would kill a man i couldnt watch it anymore. Reporter his parents say the father of four may have been trying to run from the officer because he wanted to avoid jail time for back child support. But they do not believe he reached for the officers taser. Do you think that this murder charge would have been filed if this video did not exist . It would not. Reporter slager also a coast guard veteran joined the Police Department six years ago. In 2013 Police Records show slager was exonerated following a complaint of improper use of force with a taser involving a black man. At a Court Appearance yesterday slager entered no plea. I have two and one on the way. Reporter today the mayor announced the city would still pay for the insurance of slagers wife who is eight months pregnant. We believe that is the humane thing for us to do. Reporter North Charleston has about 100,000 residents. Nearly half are africanamerican. Yet according to the latest data black officers make up just 18 of the police force. We need help reporter protesters here say that needs to change. In an effort to calm tensions here both the mayor and the police chief met with Walter Scotts family this morning. Now, police say dashcam video of the incident does exist. And we could see it released as early as tomorrow lester. All right, gabe. Thanks very much. Now to our nbc news exclusive, our interview with that bystander who recorded the shooting. His name is faden santana. Tonight hes speaking out for the first time about what he saw and what he recorded that day. I spoke with him just a short time ago. What made you pick up your phone and start shooting on saturday . Well when i saw the scene, i was walking to my job. I was walking to my job. I see mr. Scott, rest in peace, and i saw police after him, chase him. I was on a phone call. And i decide to go over there and see what was going on. Was there a struggle . There was. They went down on the floor. They went down on the floor. Before i started recording they were down on the floor. I remember the police had control of the situation. He had control of scott. And scott was trying just to get away from the taser. Taser you can hear the sound of the taser. Hed been tased at that point . Yeah yeah. Before i started recording. And i believe he just wanted to get away of the taser. Like i said he never used the taser. So mr. Scott runs away. Yeah. And then whats the police offic do . As you can see in the video the Police Officer shot him in the back. And i knew right away i have something in my hands. Ultimately you turned it over to the attorneys for the family. Yes. What was their reaction to you . Well it was, like i said they were very emotional, you know when that happened. Including cause like when i turn i felt i thought about his position their situation. I said if i would have a Family Member that would happen i would like to know the truth. As a result of that videotape, a man, a Police Officer has been charged with murder. How do you feel about that . Well like i say, its not something that no one can feel happy about. He has his family and mr. Scott also has his family. But i think, you know he made a bad decision. And, you know you pay for your decisions in this life. I think, like i say, mr. Scott didnt deserve this. And there were other ways that can be used to get him arrested. And that wasnt the proper way to do that. My conversation with faden santa na earlier this evening. Hear much more from him tomorrow toda th shooting here in North Charleston follows a slew of stories including ferguson missouri. A city that bears scars following a Police Shootout on their own streets. Its where we find our ron allen tonight. Reporter after months of turmoil after the death of Michael Brown. Ferguson made history. Poised to transform a city and Police Department. Now with numerous fatal encounters between police and minority suspects still happening, some on video, the question is has anything really changed across america . I cant breathe. I cant breathe. Certainly theres greater awareness. Now theres a conversation in lots of communities about police reform. But not enough has changed. Reporter National Police are required to report officerinvolved shootings. Most of the numbers are an ekecdotal. 76 unarmed people of color killed by police in the last 15 years. The Obama Administration has opened nvrgsinvestigations of 20 Police Departments for alleged bias. And while incidents caught on camera like North Charleston or this gas station, have led to charges against the officers. Cases like that of this 12yearold killed by Cleveland Police responding to reports he had a gun that turned out to be fake remain under investigation months later. Leslie bell a judge and professor of criminal justice, was elected to represent the ferguson neighborhood where Michael Brown was killed. What is the real problem between police and Minority Community . Theres too much us verse them. Let me be clear on both sides. We got to start bridging that gap. Reporter and when that new Council Meets here in ferguson it will have some real power. New police chief, city manager and Municipal Court judge, decisions that could profoundly change the direction of this town. Lester. Ron allen in ferguson tonight. Thanks. For the First Time Since december an american soldier has been killed in afghanistan. Seven others were wounded when a man in an Afghan Military uniform opened fire on them at a governors compound in jalalabad, according to u. S. Officials. American forces returned fire and killed the gunmen. The shoout happened just after a high ranking u. S. Embassy official had left the compound. A lot more news still ahead as we continue tonight. 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There are tornado watches and warnings in several states tonight, part of a multiday Severe Weather outbreak. A dangerous system sliding across the country right now with millions on high alert. Reports of damage already in parts of missouri. Our meteorologist dylan dreyer is in our studio in new york. Dylan, whats the latest . Lester, we have had reports in kansas and missouri of hail the size of baseballs, everyone grapefruit size hail being reported. Storms are developing right along this frontal boundary. This is the separation between temperatures in the 70s and 80s and to the north of it like in omaha temperatures are only in the 40s. And its right along this front as we go through the night past midnight into the Early Morning hours on thursday where we will still see the threat of very strong storms. Well get a brief breakthrough midmorning on thursday. They refire up thursday afternoon into thursday evening. So tonight we are looking at our biggest threat especially back through parts of tulsa, oklahoma into southern indiana. Thats where we could see, again, hail about three inches in diameter. Also wind gusts up near 75 miles per hour. And tornadoes possible. Those same threats are in the forecast on thursday too, but in a much larger area from texas all the way up into the great lakes through the afternoon and evening on thursday. Lester. All right, dylan. Thanks much. Up next tonight, the airline apologizing to a woman with cancer after forcing her to get off the garden is the story of our lives. Told and retold. Its as old as our time on earth. And as new as tomorrow. You can have a yard. Or slightly less. Gardening isnt about where we choose to live. Its about how we choose to live. Miraclegro. Life starts here. To you, theyre more than just a pet. So protect them. With k9 advantix® ii. Its broadspectrum protection k ills fleas ticks and mosquitoes too. K9 advantix® ii. 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