No Regrets

Danny and Maria investigate a string of murders that appear to be random, and try to find a connection. Their investigation leads them to interview a former prosecutor and colleague of Erin's, when it is revealed that all of the shooting victims beat previous murder raps or served very short sentences. Jamie tries to figure out why a young boy ran to him in the street for protection, and discovers the boy comes from a troubled household. Meanwhile, Frank meets up with a former astronaut and long-time friend, and learns his friend may have a serious drinking problem.