in boston or driving a humvee in afghanistan, the district attorney and two time bronze star, brett walker, loves to serve his country. >> i've always identified myself as a soldier, the soldier makes me the husband and the father and the prosecutor that i am. >> on friday in front of family coworkers he was promoted to major in the massachusetts army national guard. >> the fact that you allowed me to conduct this here, means a lot. >> as a way of giving back every friday major brett walker dedicates his time to the treatment, and finding those in trouble getting a second chance at life. it is my job to make them aware of the programs available to them and provide the motivation to get into those programs. >> he is so passionate about it, so he comes home talking about these veterans how he wants to hear all these wonderful things and push through. >> like the defendant who has been in the treatment program for a year. >> i came back with multiple issues in my life post- traumatic stress disorder and the treatment team has saved my life. >> we couldn't be prouder of brett seeing him be pro