Complex sentence: Maguire tracks him and his son to a roadside diner, but fails to kill Sullivan, who, realizing Maguire's intention just in time, punctures Maguire's car tire before escaping.
Split into simpler sentences: Maguire tracks him and his son to a roadside diner, but fails to kill Sullivan. Realizing Maguire's intentions, Sullivan punctures Maguire's car tire before escaping.