RICHFIELD, Wis. (AP) – A man has been arrested in the killing of his 76-year-old father in Richfield.   According to Washington County sheriff’s officials, the 37-year-old son called deputies at about 9:20 p.m. Friday saying he killed his father, with whom he lived.  When deputies arrived, the suspect left the residence and surrendered. Deputies found the body of the father inside.  He’s being held at the county jail and is expected to have a court appearance Wednesday.  Their names haven’t been released.