TRAVIS COUNTY - An Austin man who has been a child advocate for years is now accused sexually assaulting a little girl.
53-year-old Billy Dan Carroll was arrested over the weekend for victimizing an eight year-old girl.
Carroll had been a CASA volunteer for four years, and didn't have a criminal record.
Police say Carroll assaulted the girl in his home.
The girl told her older sister who called their mother.
Investigators don't think this is an isolated incident, and are trying to find other victims.
Bond for Carroll has been set at two million dollars.