The man accused of killing 19-year-old Lizzie Garrow of Canastota last September pleaded guilty Thursday to second-degree murder, according to the Madison County District Attorney's Office. 

George McDonald Jr., 25, of Kirkville, said he intentionally killed his wife Lizzie by stabbing her multiple times with a kitchen knife and then abandoning her body by a Thruway overpass on Main Street in Canastota. 

As part of his guilty plea, McDonald has waived his right to appeal. 

Sentencing is scheduled for Oct. 7, when McDonald is set to be sentenced to 20 years to life in state prison