WKYC-TVSabrina Zunich pleads guilty to murder in death of foster mother - UpdateNews-Herald.comZunich, now 19, killed 41-year-old social worker Lisa Knoefel as she slept in her Chagrin Drive bedroom Nov. 16, 2012. She and her foster father, Kevin Knoefel, planned the crime together, prosecuting attorney Jamie Eck said. Zunich pleaded guilty Aug.Sabrina Zunich changes plea to guilty in November 2012 murder of foster mom ...NewsNet5.comTeen charged with killing foster mom changes plea to 'guilty'fox8.comWoman changes plea to guilty in love-triangle murderWKYC-TVall 7 news articles »