Complex sentence: It was created by a handful of people, most notably Kidd (Seth Sanders), MacGyver (Kim Taylor), and CumbaJohnny (Albert Gonzalez), who would later become an informant for the Secret Service beginning April 2003.
Split into simpler sentences: It was created by a handful of people, most notably Kidd (Seth Sanders), MacGyver (Kim Taylor), and CumbaJohnny (Albert Gonzalez). CumbaJohnny; who would later become an informant for the Secret Service beginning April 2003.