Chief J. Noe Diaz formally asked the Texas Rangers to open their own investigation into the fatal shooting of Lorenzo Salgado Araujo by an ICE agent.
The request followed a DPS response saying the agency was not involved because it had received no request from any federal, local, or prosecutorial authority.
Mayor John Whitmire directed Diaz to send the letter after a week of talks with state and local agencies, with the city framing the move as a step toward an independent, transparent review.
Houston-area lawmakers had already urged DPS to launch a parallel probe, arguing the Rangers have statewide authority to investigate officer-involved shootings, including those involving federal officers.