BENTON COUNTY, Tenn. -- The man accused in the death of a 7-month-old appeared in court Wednesday. Westlee Yates was in court Wednesday morning in Benton County for his preliminary hearing. His hearing was reset for an unknown date pending a mental evaluation. Yates was wearing a bullet-proof vest in the courtroom. Investigators say Yates killed his girlfriend's 7-month-old son, Joseph Hilliard, at their home in Holladay. He is charged with first-degree murder and aggravated child abuse.