On December 12, 1825, Watchman Jonathan Houghton became the first Boston law enforcement officer killed in the line of duty. John Halloran, who was hung for the crime in March 1826, killed him on State Street. Watchman Houghton’s name, along with that of David Estes, who was killed in 1848, was recently sponsored by the department for inclusion on the National Law Enforcement Memorial in Washington, D.C.