The Public Protection and Advocacy Bureau protects Massachusetts residents from discrimination, fraud, unfair labor or business practices, and other crimes. The Public Defender Division of CPCS is seeking Trial Attorneys to provide criminal defense representation in various offices throughout the Commonwealth.Contact Us. Give us a call or fill in the form below and we'll contact you. We endeavor to answer all inquiries within 24 hours on business days. Welcome to the website of the Massachusetts Committee for Public Counsel Services. Prosecutors are attorneys who have the role of representing the government in criminal cases. Public defenders safeguard the constitutional rights of indigent people accused of committing a crime. The work is fast-paced and litigation intensive. As a representative of clients, a lawyer performs various functions. As advisor, a lawyer provides a client with.