A battle was brewing even before his death over the right to determine the proper care for the aging blues master.  That has now escalated into a claim by two of King's daughters that alleges their father was poisoned by his business manager.  Karen Williams and Patty King contend that Laverne Toney administered '...foreign substances to induce his premature death'. King passed away May 14th in his Las Vegas home (story).  Attorneys representing the King estate called the claim baseless and disrespectful, but the coroner for Clark County, Nevada is now obliged to conduct an additional and more detailed autopsy. The original ruling was that King had died from a series of strokes related to his diabetic condition.  Toxicology results from the new autopsy are expected to take up to eight weeks to be returned.

BBC.com