It's Beginning to Look a Lot Like Murder by Jeff Markowitz

Cassie O'Malley is back in a Christmas mystery that will keep you laughing and guessing until the final showdown. At odds with her new boss, tabloid reporter Cassie O'Malley finds herself covering the shopping mall at Christmas. Cassie wants nothing to do with the assignment. Then Big Mack turns up dead in the men's room, his throat slit.