Searching the doctor's home, Ambrose finds a small replica of the mysterious black rock seen at the Mosswood commune, confirming the doctor's deep ties to the group.

, titled "Part III" , originally aired on August 15, 2018 , on the USA Network . This episode, directed by Antonio Campos , continues the investigation into the double murder committed by the young boy, Julian Walker . Plot Summary

Heather Novack discovers a novel titled "Dolphin Beach" among her missing friend Marin's old belongings. The name "Julian" is circled and underlined repeatedly throughout the book, suggesting that Marin , not Vera , is Julian's biological mother. Watch The sinner s02e03 internal 720p web x264-...

Ambrose begins to find personal parallels between his own troubled childhood—including his history with a house fire—and Julian’s situation. He gives Julian his phone number, urging the boy to call him if he needs to talk. Episode Details

Detective Harry Ambrose and Heather question Dr. Sheldon Poole , the obstetrician who signed Julian’s birth certificate. After admitting he was not present for the actual birth but was called to the Mosswood commune afterward, the doctor excuses himself and commits suicide by slitting his own throat with a scalpel. Searching the doctor's home, Ambrose finds a small

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