Sydney, Australia — A former Australian high school teacher convicted of murdering his wife after a hit podcast unearthed new evidence was on Friday sentenced to 24 years in prison. Chris Dawson, 74, was found guilty of killing Lynette Dawson some 40 years ago while pursuing an affair with his teenage babysitter and former student. Her body was never found and there were few leads in the case until 2018 when "The Teacher's Pet" podcast sparked renewed public interest and ultimately a fresh police investigation. The murder had been driven by Dawson's "possessive infatuation" with his former student, which led him to kill his wife, Judge Ian Harrison said Friday while announcing the 24-year prison sentence. There is a non-parole period of 18 years. "Mr Dawson is not old by contemporary standards, but he will not live to reach the end of his non-parole period," Harrison said. Dawson strenuously maintained his innocence throughout the trial. "The Teacher's Pet" was hosted by journalist Hed