B.B. King -- Family Claims Rock Star Friends Can't Say Goodbye

B.B. King is being isolated from his family and celebrity friends, including Willie Nelson, Carlos Santana and Eric Clapton, and it's all a sinister plot by his manager to fleece his estate ... so says his daughter.

Karen Williams claims in new legal docs her dad is being horribly neglected by B.B.'s manager, Laverne Toney. She says Toney has hired a caregiver who got so drunk he fell asleep and B.B. fell and bashed his face in.

Williams says Toney won't take her dad to the dentist to treat his abscesses, because she says he's broke. Yet Williams claims B.B. had a $5 million balance in his account just last year.

But Williams says the money is being drained, and quickly. She says in April 2014, more than $453k was withdrawn from B.B.'s account.

TMZ broke the story, Toney refused to let the family take B.B. to the hospital late last week after the legend suffered a minor heart attack. Cops came and took B.B. to the hospital, where he was examined and then released.

Williams says Toney has claimed B.B. is at death's door, yet she won't allow anyone to see him, which Williams says is suspicious.

Williams is asking a judge to make her the guardian of her dad's estate.