articleThe Brief Erin Patterson was sentenced to life in prison with a 33-year non-parole period for poisoning her in-laws with death cap mushrooms. She was convicted of killing Don and Gail Patterson and Heather Wilkinson, and attempting to kill Ian Wilkinson. An Australian judge on Monday gave Erin Patterson a life sentence, with 33 years before parole eligibility, for poisoning four of her estranged husband’s relatives with death cap mushrooms. Patterson was also convicted of attempting to murder Heather’s husband Ian Wilkinson, who spent weeks in a hospital. Dig deeper:Both prosecution and defense lawyers had agreed that a life sentence was an appropriate punishment for the then-50-year-old on three counts of murder and one of attempted murder.