Complex sentence: When Rachel is waiting to change trains at the 30th Street Station in Philadelphia, Pennsylvania, Samuel uses the men's room, then suddenly witnesses the brutal murder of Officer Zenovich (Timothy Carhart).
Split into simpler sentences: When Rachel is waiting to change trains at the 30th Street Station in Philadelphia, Pennsylvania, Samuel uses the men's room. As he does so, he accidentally witnesses the brutal murder of Police Officer Zenovich (Timothy Carhart).