An Oelwein man has been convicted of sexually-abusing two, three-year-old girls at his home, where his wife provided child care. 54-year-old Dennis Folkers was found guilty of two counts of second degree sexual abuse and faces up to 50 years in prison. Oelwein police and Department of Human Services officials began an investigation in May of 1999 after one of the victims made comments to her parents and a nurse who examined her. Folkers will be sentenced February 28th.