Medical experts found no evidence that blues legend BB King was poisoned before he died, post-mortem tests have revealed.
Tests conducted after two of the star's 11 adult children said their father had been murdered showed the cause of death was Alzheimer's disease, plus physical conditions including coronary disease, heart failure and the effects of Type 2 diabetes, Clark County coroner John Fudenberg said.
Daughters Karen Williams and Patty King had said through their lawyer, Larissa Drohobyczer, that King's business manager LaVerne Toney and his personal assistant Myron Johnson hastened their 89-year-old father's death.
Brent Bryson, a lawyer for King's estate, has said the claims are defamatory.
"Ms Toney and Mr Johnson are very happy that these false and fictional allegations that were made against them by certain of Mr King's children have been dispelled," Mr Bryson said.
"Hopefully we can now focus on the body of musical work that BB King left the world, and he can finally rest in peace."
The findings close official investigations of King's death.
King died at home in Las Vegas under hospice care.
The allegations drew intense interest while the daughters led a group of several of King's surviving adult children and grandchildren in an unsuccessful bid to wrest guardianship and oversight of the King estate from Ms Toney.
Williams, Patty King and daughters Rita Washington and Barbara Winfree instructed Ms Drohobyczer to contest their father's will.
Tests did not detect any substances that might have hastened King's death, Mr Fudenberg said.
The tests were conducted on May 24, 10 days after the death.