Who is the murderer in The Mousetrap? Please provide evidence.

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D. Reynolds eNotes educator | Certified Educator

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In a surprise ending to the play, the murderer is revealed to be police detective Trotter. However, Trotter is an assumed name, and the man is actually not a police detective at all. It comes out that he is Georgie Corrigan, a 22-year-old whose younger siblings died due to terrible abuse when sent to live with a couple called the Lyons. Georgie murdered Mrs. Lyons in revenge for what happened, although she had already served jailed time.

While he is posing as Trotter, Georgie arrives at a snowed-in guest home called Monkswell Manor saying he is investigating the Lyons murder. While he...

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