Red Blood On White Cotton by John W. Long

Attorney John Reynolds returns to his childhood home for the funeral of his father. A letter left for him implores him to investigate the disappearance of his brother 30 years ago. He learns his father was involved with a criminal organization and there are dark secrets from Riverdale Plantation where he grew up. Reynolds enlists the aid of his late brother's best friend to help him solve the mystery of his brother's disappearance and uncover the dark secrets of Riverdale Plantation.