Houston - Ronaldo Salgado said he learned his father, 52-year-old Mexican immigrant Lorenzo Salgado Araujo, had been shot by an Immigration and Customs Enforcement officer last week through a video posted online that depicted him screaming for help. He was actively bleeding. He was screaming for someone to help him, Ronaldo Salgado told CBS News during an interview in Houston this week. I just felt a lot of fear at that point. And I was running around the site trying to look for answers but those answers never came. His younger brother, Lorenzo Salgado Jr., said he found out his father had died while on an airplane on the way to Houston to try to see him. I was going back and forth between the bathroom to like clear my nose, Lorenzo Salgado Jr. said. And I really tried to stop the tears from falling because I didn't want anyone's attention. I really just wanted to get home and be with my family. Lorenzo Salgado Jr. noted he was not able to say goodbye to his father, who had lived in the U.S. for over three decades. Ronaldo Salgado, meanwhile, said he feels deeply guilty about what unfolded last week. I'm always going to feel some sort of guilt that I could have been there sooner, that I could have done something, he said, breaking down in tears. I fear that I will always live with that guilt, because who knows what would've happened if I had been there or if I had arrived at the scene much sooner. Conflicting accounts The Department of Homeland Security said Salgado Araujo weaponized his work van during a traffic stop on July 7 in Houston, prompting an ICE agent to shoot and kill him. That allegation has been disputed by Salgado Araujo's family and the three men who were in the van, including his brother. They remain detained by ICE in Texas, facing deportation. While DHS has said Salgado Araujo was in the U.S. illegally, it has also admitted he was not the target of the ICE ope #cbsnews #crimewatchdallas