Francis Hacker was an English soldier and one of the Regicides of King Charles I of England. Hacker was a Parliamentarian Army officer from Nottinghamshire. His family were Royalists — one of his brothers died fighting for the King, another lost a hand in his service. Colonel Hacker commanded the soldiers who guarded King Charles during his trial and controlled access to him. Wikipedia
The definitive Wikipedia entry for Francis Hacker. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Francis_Hacker