This is normal police work.
We're pretty lucky sometimes, thanks to astute officers who noticed this was more than a traffic accident.
There was an anonymous tip called into the Houston Police Department. The photo came into play because an associate of Potts' knew that to be his daughter. The woman he had this child with called him, and his daughter called him. She was mad at him because they were showing it on TV.
As of this time Mike Williams has resigned from the department. He has not been terminated. He resigned during the course of the investigation.