Hedley Thomas, 56, Brisbane, shares the very personal family tragedy which inspired his investigation into the disappearance of Lynette Dawson. After Lyn vanished in 1982, her husband Chris moved the couple's teenage babysitter into their home and later married her. Hedley's investigation led to smash hit podcast The Teacher's Pet and fresh interest in Lyn's case. Chris Dawson was sensationally convicted of Lyn's murder in 2022.