Complex sentence: With the aid of Lord Holmes'traitorous assistant, Miller's group tracks Holmes to Ryan's home in Maryland, kills the U.S. Diplomatic Security Service agents and the state troopers guarding the house, and attempts to kidnap Lord Holmes.
Split into simpler sentences: With the aid of Lord Holmes'traitorous assistant, Miller's group tracks Holmes to Ryan's house in Maryland. They kill the U.S. Diplomatic Security Service agents and the state troopers guarding the residence, and make an attempt to kidnap Lord Holmes.