The executors of Michael Jackson's estate have said they are concerned about the welfare of the singer's mother and his three children.
Turmoil among the late star's family has been played out in the public eye and online, and this week deputies responded to a family disturbance at the hilltop home where Katherine Jackson and her three grandchildren live.
In a letter posted on fan sites hours later, estate executors John Branca and John McClain wrote: "We are concerned that we do what we can to protect them from undue influences, bullying, greed, and other unfortunate circumstances."
Randy Jackson then accused Branca and McClain of criminal misconduct and claimed his brother's 2002 will was a fake. "They know that they've been caught, they know that they've falsified a document and they know that there are questions that we want answered," he told MSNBC.
Jackson's estate has denied all claims of wrongdoing and hinted further action may be taken to protect the singer's children.
His daughter, Paris, has posted Twitter updates voicing her displeasure with not being allowed to speak with her grandmother for more than a week.
Katherine Jackson was reported missing over the weekend but was later found to be with her daughter Rebbie and relatives in Arizona. She hasn't spoken to her grandchildren since leaving the Los Angeles area on July 15.
A sheriff's spokesman said deputies continue to investigate an altercation on Monday afternoon involving two adult males, but declined to identify them. A battery case may be presented to prosecutors, but that decision hasn't yet been made.
Randy Jackson said he and siblings Jermaine and Janet went to the home in Calabasas on Monday to invite his brother's older children, Prince and Paris, to join their grandmother in Arizona.
Sandra Ribera, Katherine Jackson's lawyer, wrote in a statement: "After exiting their vehicles, Jackson family members ran up to Michael's children as they yelled and began to aggressively grab at the cell (mobile) phones in their hands."