Can a policeman answer my question about litigation?

Do you face a lot of litigation? I was thinking about applying for the Texas Department of Public Safety as a state policeman, I am very well qualified, with the needed credentials.. I have a fear that I will face lawsuits all the time. Is this fear justified? I feel like if I shoot someone when it is completely 100% justified, I will be charged and stripped of my uniform anyway by overzealous lawyers. Do you get your busted for just doing your job?