Hiding right there, so close. Bystanders tried assisting multiple victims. We have more video. We want to warn you. It is very disturbing. I know. You know, the thing about this, this is something that plays out every day. People playing out their daily lives, going to walmart, going shopping. No one expected to be interrupted by an attack like this. In fact, listen to one person, as he did his best to hide when it started to happen. In mcdonalds, what happened . Im looking to see whats going on. More people are coming in. And i hear, boom, boom, boom. We run out of the mcdonalds out of an emergency door. The suspected gunman is from allen, texas. That is more than 600 miles away, 1,000 kilometers. Authorities say a document posted online shortly before the shooting, appears to be an antiimmigrant manifesto. The governor of texas addressed that earlier. This is disgusting, intolerable. It is not texan. And were going to aggressively prosecute something. As a capital murder and a hate crime, which is what exactly it appears to be, without seeing the evidence yet. I dont want to get ahead of the evidence. We have to be very, very clear, conduct like this, thoughts like that, actions like this, crimes like this, are not who or what texas is and will not be accepted here. Texas has been the scene of many mass shoots in u. S. History, though. Cnns ed lavandera has been covering this story from el paso soon after it broke. Ed filed this story a short time ago. Reporter here in el paso, investigators will continue to work throughout the night, processi ining the crime scene the walmart. This is the back of the building you see behind me. Investigatorsg in and out and the Shopping Center remain locked down. The victims that died inside the store will remain there, as the Forensic Experts continue to do their work inside. Thats a gruesome, horrifying scene. Thats happening as the investigation continues. We understand that federal investigators have opened up a domestic terrorism investigation. Theres a hate crime component. Local authorities here are taking the lead. Everyone from local police to the governor of texas, vowing to prosecute the suspect to the full extent of the law. That means in the state of texas, this could be a case where we see the Death Penalty inflicted upon the suspect. There is still tense and agonizing moments for the families here. Especially the family we met early today. Two of her children tell us they have been trying to connect with their mother, who they last spoke to as she was in the ch k checkout line in that walmart, moments before the shooting e rumtd eerupted. They have not heard from her throughout the day. And david romero, outside of the walmart store, waiting for her nephew to come out, when she started to hear the gunshots erupt. What she saw next is something she will never forget. I was waiting for him to come out. It was taking too long. I heard the first one. I was like, whats going on . It was so loud. Very loud. Everybody dropping. Thats when i ran in there, trying to. I saw him run this way so i chased him. I thought he got shot. And the baby my nephew, theres a baby that some man carried that got shot. The guy just gave him to the ambulance. I dont know. Reporter those are the witnesses of the scene this morning. Thats the moments that many survivors and witnesses are experiencing and dealing with at this very moment. There is the efforts to get informations from the victims here. Here, tonight, in the overnight hours, crime scene investigators inside that walmart. That will continue through the night. Ed lavandera, cnn, el paso, texas. Reaction is coming in from politicians, throughout the United States. Donald trump took to twitter saturday to condemn the attack. He said the shooting was not only tragic, it was an act of cow w cowardi cowardice. Theres no reasons or excuses that would justify killing people. But beto orourke called out the president after the shooting. Orourke said the president s rhetoric against minorities may have played a role in this attack. Yes. Weve had hate crimes every single one. During an administration, who had a president who called mexicans, rapists and criminals. Though, mexicans have committed crimes at a lower rate, he is tried to make us afraid of them. Attempting to ban all muslims from this country. The mosque in texas was burned to the ground. The chants we heard in greenville, north carolina, send her back, talking about our fellow american citizens, duly elected to represent their constituents in the congress, happen to be women of color, he is a racist. And he stokes racism in this country. It doesnt just offend our sensibilities. It changes the character of this country. And theres details that we are waiting on. Im just following the lead that i heard from tell paso police department, that they say there are strong indications that this shooter wrote the manifesto, and this was inspired by his hatred of people in this community. Police are investigating whether the suspect wrote the manifesto that orourke mentioned. Lets talk to brian levin, the director of study of hate and extremism. Brian, thank you for your time today. George, as always, thank you. Absolutely. We appreciate you being with us to give us some insight on this. Strong words from the democratic president ial candidate, beto orourke. El paso is his hometown. What are your thoughts how rhetoric might play into hate and extreme were seeing. Thats a great question. We came out this week with a roarke, where we said white supremacist, extremism, is the most descendant in a very diverse threat matrix. With respect to your specific question, weve done Interesting Research with West Virginia university. We found in a after the muslim ban proposal came out, five days of the San Bernadino terrorist attack, hate crimes against muslims were 300 above the average daily for the first 11 months of the year. After the muslim ban proposal, went up a 23 increase. 2016, election month, worst month for hate crime in 14 years. And the day after election, which included a bomb plot against a muslim apartment complex, was the worst day since 2003. And our specific research, we did for the study of the center of hate and extreme himmiiextre studies from the southern United States. Just give me one second. When candidate trump launched his campaign on a news week. Going back to 2016, that was the group that had the biggest increase during that month. Want to talk about the alleged gunman, now. He gave up, without a shot fired. Given your understanding of who would do this type of thing and why someone would do this type of disgusting thing, what do you think was behind that . I think its chilling that it matches exactly what we wrote on page 3 of our study, that came out at the end of july. What i talked about in the study, how these kinds of extremi extremism, that shes are a terrorist act of white supremacists, were waiting until authorities call it that. If one reads the manifesto, which i have, it references prior acts and a book and a doctrine that is popular among white supremacists. Were seeing a vertical integrati integration. These folks are referencing prior killers and rioting, and trying to inscribe their own of another chapter of this racist bible of evil, that is taking place on the internet. Its a newer trend that weve been seeing. But its scary and something weve seen, with young males, from about 19 to 21. And what they do is theyre angry, theyre frustrated, theyre away from their families and left school. And what happens is, the fears, grievances and frustrations are amplified, sculpted and directed to who is regarded as legitimate targets of aggression in these subcultures. And this particular subculture is how whites are being overrun with people of color. With him, he was talking about latinos. He referenced texts that were talking about europe being overrun by muslims. His world, its going to be latinos. One quick thing. You reference about political rhetoric. The tree of life back in october, it was around a contentious political season. And jews were targeted. But they were targeted because they wanted to help latino immigrants, according to that assailant. I want to delve in on the online chat boards. No reason to name the chat board. But the gunman posted his twisting reasoning on this board. It is ripe with racist and antisemitic speconspirery theories. Is there anything that can be done to monitor these sites . It was a short amount of time when he posed and the attack took place. Allegedly posted the message, i should say. We are waiting for official confirmation. But if we look at the past instan instances, these folks have posted on affinitybased platforms. Theres been a migration this is in our study, too. Go to prop 11, youll see the study on twitter. Theyreting radicalized obvious the web. And theyre id logically motivated, dangerous or personal benefit and revenge. You can mix and match. But one is usually predominant. We have more ticking timebombs in the United States. White supremacist, supremism,p t jihadists. Social Media Companies need to do a better job. Theres been a migration to these platforms that you discuss. The affinitybased platforms. Theyre not cats playing the piano, vicious, vicious, bigo y bigotry, by this assailant. Given that this is a developing story and i want to be clear because i misspoke a moment ago. Investigators are looking into, determining whether this alleged gunman posted this on that site, that doesnt deserve mentioning. We will bring you the updates. Brian, we appreciate your time. Thank you. Thank you, as always. Lets get some insight, now, from the scene from cnn Law Enforcement analyst, josh campbell, hes a former fbi supervisor special agent. Josh spoke with Alex Marquardt, about the attack. Lets listen. The bureau has opened what theyre calling a domestic, along with a state investigation. The fbi has opened a concurrent case to look at the motivation of the shooter, ideology, if theres a hate crime angle to this. Trying to get into the mindset of the shooter. Someone who came here on the basis of hate. I was covering another mass shooting, and the fbi providing resources. The profilers from the Behavioral Analysis at quantity coe. We can bet there will be a host of resources that the federal government will be bringing to bear. Theres offices that are sending resources here and headquarters are standing by to deploy to this location, should they get requests from state officials here. A fraj di, that played out. My home state. Diverse people, and people coming together in times of tragedy. Were seeing that play out right now. We saw long lines, people coming together to donate blood given this terrible attack that happened. Well have more on that, as newsroom continues. Did you know you can save money by using dish soap to clean grease on more than dishes . Try dawn ultra. Dawn is for more than just dishes. With 3x more grease cleaning power per drop, it tackles tough grease on a variety of surfaces. Try dawn ultra. So chantix can help you quit slow turkey. Key. Along with support, chantix is proven to help you quit. With chantix you can keep smoking at first and ease into quitting. Chantix reduces the urge so when the day arrives, youll be more ready to kiss cigarettes goodbye. 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The folks of el paso, always talk about what a close community, a safe community. You can see it from the local officials. That was joe moody, talking about what happened in el paso. Were recapping our top story. Heres what we know about this attack. 20 people were killed. 26 others injured. This when a gunman opened fire at a Shopping Center. A 21yearold has been destadetai detained and faces capital murder. He is going for blood. Hes going for death. He wants the bloodlust. He wants to fulfill. After people start running, trigger finger. People were yelling, run, shooter. We got closer to the back, we didnt hear much of it. Im going. At this point, many people are unaccounted for after this shooting in el paso. Our Alex Marquardt spoke with the mayor of el paso. Were waiting at one of the schools of el paso. Its tough. Its tough and heartbreaking. What about the investigation . What are authorities telling you . What more do we know about the investigation into him and his motive . There isnt much to update. This gentleman this murderer, who came from outside of el paso. No one in el paso would have done Something Like this. The investigations are going through and identifying the bodies. And theyre going through normal forensic work. And the families will be noti notifi notified. Nothing new is happening yet. Was the shooter do you know. Was he known to authorities . I dont know that. I do not know that. He came from i think, allen, texas, where they said he came from. My point is, that just a real tragedy. Just a normal saturday for people. And this tragedy struck. You and others have talked about how tightknit this community is. What has been the reaction, since the horrific massacre happened just nine hours ago . Its been significant. This is a generous community. Its a community that goes back 350 years. And people dont understand. Theres the largest on the u. S. mexico border. Theres nothing that can equate with juarez. Probably never would have occurred in el paso. You must be heartened to see the long lines of donors coming out to donate blood. Theres been calls for people to sign up online. What can people zoo do to help community right now . The el paso donation website has set up a website. And continuing to tell people to donate blood. Thats what we need. They are doing that. After the shooting, the call went out for donations. The blood supply is usually overwhelmed in situations like this. And dozens of people are lined up to donate blood. Our wolf blitzer spoke with one of them. Its somber. You hear sniffling earlier, as the updates are coming across the tv in the waiting room. 28 lain continues to grow. The blood center is at max capacity. Everyone in line, theres easily 75 to 100 people in line, and theyre aware that all theyre doing is standing in line to make appointments for tomorrow and monday. And they are willing to wait to get up to the front, to make an apartme appointment. El paso, supposed to be in the 100s. Youre doing a really, really, lifesaving work. What motivated your, francis . You know, im bpositive. I try to be positive in my life. If theres something i can help with. Its easy to make a dollar but harder to make a difference. I try to do whatever i can to help. When you speak to others waiting in line, what are they saying to you . How can it happen here . Its crazy. Its walmart. El paso is big but a small city. Everybody knows everybody. You know, immediately, when everything happens, this morning, my son called me. He was at work. From there, it just the group texts just started with everybody, checking in p everybody in louisiana and california. Everybody checking in and making sure everybody was safe. Looking at the video and knowing how it touched so many people in that community. Seeing them come out. That is heartwarming. People feel helpless. A possible clue to the shooters motive. What police are looking for in the manifesto, reportedly left by the suspect. Hey, who are you . Oh, hey jeff, im a car thief. What . im here to stwell, thats my job. What . What . . What . laughing what . . What . what . [crash] what . haha, it happens. And if youve got cutrate car insurance, paying for this could feel like getting robbed twice. So get allstate. And be better protected from mayhem. Like me. Can the past help you write the future . Can you feel calm in the eye of a storm . Can you do more with less . Can you raise the bar while reducing your footprint . For our 100 years weve been answering the questions of today to meet the energy needs of tomorrow. Southern company you need some tlc on your eyelashes meet lash serum solution. Conditions and cares for your lashes with lash caring complex. See a denser, thickerlooking lash fringe in just 4 weeks. I would highly recommend it to anyone. With lash serum solution, 7 out of 10 women saw fewer lashes lost during makeup removal. My husband has noticed a difference. I really love lash serum. Over 10,000 women have tried it and love it. Try new lash serum solution. From loreal paris. The mucma fest of summer. Country musics biggest stars perform their hottest hits. And the first time ever. Lil nas x, Billy Ray Cyrus and keith urban perform the hit old town road. Cma fest sunday 87c on abc. And after the show check out a special encore performance of brett youngs song, catch. Available only on xfinity. Just say brett young into your x1 voice remote. Welcome back to cnns continuing coverage of the mass shooting in el paso, texas. Im natalie allen. Im George Howell. The mass shooting, this time in texas, at a mall wawalmart, el paso, saturday. 20 killed, 26 injured. Thousands of people may have been in and around that store when the attack began. Heres how one witness described the gunman and show she survived. He just walked in, and started shooting at everybody. We were hiding for ten minutes. Everything was calm. And i started pushing people out of walmart, and telling them to get out, get out. The first thing i heard was the gunsh gunshots. When i turned around, and to see what was going on, thats when i saw him and thats when i ran back with my mom and i told her, lets go, lets go. And i started to help the senior citizen, help her get out. Getting people out of there. Letting them know we need to exit out. Before the 20 minutes to the first call to police, that said, i cant wait any longer. Right now, we have a m manifesto from this individual, that indicates that it has potential of hate crime. Dont mean to step on fbi