I thought Caesar was killed by Brutus his son, and not by any body part of his body guard...
I've never heard about bodygards too. Maybe there are different versions of how it happend. In the textbooks they usually say he was killed by a group of senators lead by Cassius and Brutus. (And, as far as I know, Brutus wasn't his son, it's just a legend. He was his favorite or something.)