Complex sentence: Upon arriving at a forested plot of land just across the New York/Connecticut border, owned by a friend of Burke's, the three men opened the trunk of the car and Tommy and Jimmy murdered Devino, while Hill looked on.
Split into simpler sentences: Upon arriving at a forested plot of land just across the New York/Connecticut border, owned by a friend of Burke's. The three men opened the trunk of the car and Tommy and Jimmy murdered Devino, while Hill looked on.