Mason arrests Lionel. Kelly and Joe tell Mason about Sophia's affair with Lionel, and he becomes convinced that Lionel murdered Channing. Sophia phones Mason and tells him to check Lionel's tuxedo, and Mason finds the note she planted there.

Lionel spends Christmas in jail. The police let mason know that they found lionel's fingerprints in the Capwell study. Mason searches the Lockridge house again, while the family is taking Christmas dinner to Lionel.