A Snohomish County jury had convicted Derron Alexis of criminal mistreatment and unlawful imprisonment. His former girlfriend, Mary Mazalic, was sentenced earlier to 30 years in prison on her conviction in the case.
The Daily Herald reports Alexis maintained he was never responsible for the young girl and didn't want her when his mother - the girl's adoptive parent - sent her to stay with him.
The girl weighed only 51 pounds and spent two weeks in the hospital after she was rescued in 2011 from his home. She testified Mazalic whipped her with electrical cords, burned her with cigarettes and tried to drown her in the bathtub.
The emaciated girl told investigators she was made to sleep in the bathtub in the basement of the home "hundreds of times," as well as in a tent in the backyard. When she was forced to sleep outdoors, she was not always given a pillow or a blanket, and the doors to the house were locked, she said.