Between this and The Secret of Chimneys, I’m starting to get the impression that Christie was on a crusade to single-handedly take down the “policemen in detective novels are stupid” trope. Once again, we have a murder mystery where the police are competent and on top of things and aren’t completely outshone by the amateur detectives. And I’m all for it. Should I be murdered for being too sarcastic and/or pedantic at the wrong moment (the most likely motive, IMO), I’d like to think intelligent, competent homicide detectives will see I get justice. And if I could get Emily Trefusis in my corner too, well! Watch out, hypothetical murderer! Your hypothetical days as a hypothetical non-prison inmate are numbered! Hypothetically.