Complex sentence: On 2 April, Laurel tracked Sally down to a run down block of flats, when she got into Sally's flat she seen a shrine of pictures with Ashley in and her face cut out and replaced by Sally's.
Split into simpler sentences: On 2 April, Laurel tracked Sally down to a run down block of flats. When she got into Sally's flat she saw a shrine of pictures with Ashley in and her face cut out and replaced by Sally's.