What is the name of the DA prosecutor who committed suicide on to catch a predator on date line?

Know this episode to catch a predator his chris Hansen askes questions.One episode thier was a prosecutor in Texes forgot what city.The police was around his house.He did not open and shot himself and was rushed to the hospital.He was talking to an under age boy about ual stuff.In the state of Texes even talking to a under age person about ual stuff is a crime 7even if you did not go to meet them.