Complex sentence: Starling tries to apprehend Lecter, but he overpowers her which prompts Starling to handcuff herself to him in an attempt to keep him in the house before the imminent arrival of the police.
Split into simpler sentences: Starling tries to apprehend Lecter, but he overpowers her. Starling handcuffs herself to him in an attempt to keep him in the house before the imminent arrival of the police.