The shuttle company, Transportes Guerra, is based in Fort Worth. CBS News Texas spoke with the family who runs the business and confirmed that the owner, Jose Hector Guerra — also known as "Tito" — was among those killed. He leaves behind a wife and children.

Police said four suspects who were inside the stolen car when it crashed are at large, including one person carrying an assault rifle.

Two people traveling on the bus were pronounced dead at the scene on Interstate 35 and two died at a hospital, police said. Another 16 people