It was a packed house as Susan Hawk was sworn in this Thursday morning at the Crowley Courts building.
The 44-year-old former prosecutor and judge defeated Craig Watkins in November.
Hawk is the first female district attorney in Dallas County history and is the first Republican to hold a countywide office in 10 years.
She says her office must do what's right, even if that means taking on harder and more uncomfortable jobs.
Hawk wants to start a mentor program and create a mental health division.
She also took time Thursday to commend Craig Watkins for his work on exonerations.