Anna's neighbor and Ethan's father. Initially suspected of domestic abuse, he is later revealed to be a victim of Ethan's violence. He and his wife are arrested for assisting in the cover-up of Katie's murder.
Anna and Alistair are neighbors whose relationship shifts from suspicion to mutual apology after reality is clarified.
A father-son relationship complicated by Ethan's criminal actions and manipulation.
Detective Little formally identifies and arrests Alistair as a suspect in the cover-up.
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