Joseph C. Pelletier was district attorney of Suffolk County, Massachusetts, and the Supreme Advocate of the Knights of Columbus. He was removed as district attorney and disbarred for blackmail and extortion.

Jesse Harding Pomeroy was a convicted American murderer and possible serial killer and the youngest person in the history of the Commonwealth of Massachusetts to be convicted of murder in the first degree. He was found guilty by a jury trial held in the Supreme Judicial Court of Suffolk County in December 1874. He was also a suspected serial killer.