(Watertown, SD) — A convicted sex offender is pleading guilty to raping a child. KELO reports 63-year-old James Kaska made a court appearance Wednesday and pleaded guilty to one count of first-degree rape. Other charges were dropped in exchange for his plea. Kaska of Watertown had been charged with multiple counts of first-degree rape of a victim under 13, and aggravated incest. Kaska had been working at home day care in Watertown, despite being a registered sex offender.