Catherine's father was a doctor, and Catherine inherited his medical files when he died. The killer is looking for his medical file when he kills both Leona and Tom.
Catherine's father, Dr. Glenn Linton, had bought the house behind his parents' home to use as his medical office. After his death, Catherine rents this house to Tom. It is also in this house that Catherine has stored the medical records.
Catherine works for the local newspaper, the Gazette. Randall's family owns the paper, and Randall runs it.
The killer's weapon of choice is a baseball bat. It is later discovered he took the bat from belongings his son left behind when he moved away.
Tom has a Volkswagen that breaks down often. The day before Tom dies, his Volkswagen breaks.....