Dalgliesh (1983)

After Gerard Etienne is found dead in an upstairs room at the Peverell Press, Commander Dalgleish and DI Kate Miskin arrive to investigate. DI Daniel Aron joins them, his first day as a member of the team. Dalgleish's friend Gabriel Dauntsey notes that the room in which Etienne was found had apparently been cleaned. He also noted that the room was quite warm. Almost everyone at the firm may have had a reason to want him dead.