U.S. Immigration officials could not determine Friday whether the driver of the truck that killed a Harris County Sheriff's deputy had a valid visa that would have allowed the Mexican national to live or work in the country. Jose Jesus Vieyra, 56, is charged with criminally negligent homicide in a collision that killed Deputy Craig Miller Thursday night on a Katy Freeway access road. Although ICE officials originally identified Vieyra as an illegal immigrant, the agency said late Friday that it could not confirm if his visa — issued at a border checkpoint — is still valid. It is also...