Complex sentence: Brian O'Conner (Paul Walker) is an undercover police officer who attempts to find out who exactly is stealing the equipment, working for FBI agent Bilkins (Thom Barry) and LAPD officer Tanner (Ted Levine).
Split into simpler sentences: Brian O'Conner (Paul Walker) is an undercover police officer who attempts to find out who exactly is stealing the equipment. He worked for FBI agent Bilkins (Thom Barry) and LAPD officer Tanner (Ted Levine).