Complex sentence: Detective Cicero arrives on the scene after Driver has already left and finds Cop's body who promptly decides to cover up Cop's involvement in the whole mess presumably to allow his family to receive his benefits and retain some sort of dignity.
Split into simpler sentences: Detective Cicero arrives on the scene after Driver has already left and finds Cop's body. She decides to cover up Cop's involvement in the whole mess, presumably to allow his family to receive his benefits and retain some sort of dignity.