Nearly a week after an Immigration and Customs Enforcement agent fatally shot 52-year-old Lorenzo Salgado Araujo in Houston, important details are still unclear. Federal authorities have offered limited information about the July 7 shooting beyond saying Salgado Araujo tried to hit an agent with his van, prompting calls for an independent investigation and pressure from protestors and Democratic lawmakers for ICE and its parent agency, the Department of Homeland Security, to release evidence. The Texas Tribune has repeatedly posed detailed questions about the Houston shooting in emails to ICE and Homeland Security, but federal officials have not addressed most of them. Separately, the FBI's Houston office - which is leading an investigation into the potential assault on a federal officer - said Monday that it does not discuss ongoing investigations and redirected all questions to Homeland Security. Here is what we know and still don't know about the Houston shooting. What happened during the shooting? Hours following the shooting, Homeland Security released a statement saying Salgado Araujo had tried to ram an ICE vehicle, refused to follow multiple verbal commands and weaponized his vehicle in an attempt to run over an ICE agent before the officer fired his weapon in self-defense. Three men who were also in the van have since disputed that narrative, saying in written and oral comments that ICE vehicles rammed Salgado Araujo's work van and the agents were not at risk of being run over. An agent ran toward them from the side and yelled Stop! before firing from the van's passenger side, hitting Salgado Araujo in the abdomen, according to accounts provided to The Washington Post by a lawyer for some of the men, who remain in ICE custody. As of Monday, no video footage had emerged fully showing what happened during the shooting. Homeland Security said agents involved in the incident were not wearing body cameras, blaming Democrats for the lack of the equipment. In addition, ICE vehicles had no dashcam footage of the incident, according to U.S. Rep. Sylvia Gar #click2houston #crimewatchhouston