B.B. King's daughters claim that their father's death was caused by poison.

This development has catalyzed a homicide investigation into the blues singer's death according to a report from USA Today.

Patty King and Karen Williams accused the singer's business manager, LaVerne Toney and King's assistant, Myron Johnson of not getting their father the medical treatment he needed, which caused their father's death.

"I believe my father was poisoned and that he was administered foreign substances," Patty King and Williams said in an affidavit released by their lawyer. "I believe my father was murdered."

Patty King added that she witnessed how Johnson had been giving her father two drops of an unidentified liquid every night in the months leading to the singer's death.

The New York Daily News reported that Las Vegas police that an autopsy had already been done on King's body. Homicide investigators are now looking into what caused the legendary musician's death.

Still according to the New York Daily News, the family of King had been fighting with their father's aides even before the death happened.

Last year, Patty King claimed that Toney and Johnson had been stealing millions from King.

Toney, who has been named the executor of the late singer's estate shrugged off the accusations. "They've been making allegations all along," he said. "What's new?"

"I hope they have a factual basis that they can demonstrate for their defamatory and libelous allegations," said Brent Bryson,  the lawyer who represents King's estate.

"He did not want invasive medical procedures," the attorney added. "He made the decision to return home for hospice care instead of staying in a hospital."

 These unfounded allegations have caused Mr. King to undergo an autopsy, which is exactly what he didn't want," he added.

B.B. King passed away last May 14.