Jermaine Jackson and his sister Rebbie have accused their cousin of abusing the family matriarch.
Jermaine was in court on Wednesday (01Mar17), supporting his mother Katherine's elder abuse claims against Lamar Trent Jackson.
The 86-year-old claims her nephew is stealing money from her and secretly monitoring her every move with hidden cameras and microphones.
"The only place I can try and have a private conversation, is in my bathroom, pretending I am using the restroom so I can make a call." Katherine claims in court papers.
And she believes he's stealing from her by putting his name on her businesses and using her credit cards.
Katherine filed papers against Trent just before she jetted off to London to visit daughter Janet and her newborn grandchild, revealing she feared for her safety upon her return if he still had access to the family compound.
But her nephew has since denied all the allegations against him during a Crime Stories With Nancy Grace podcast on 13 February (17).
He told Grace he knew nothing of her plans to end his employment as a family driver and kick him out of his Calabasas, California home.
"My aunt left me paying the bills and taking care of the household when she got over there (to London)," he says. "We haven't heard from her since she left. It seems to me that someone is over there putting all these things together, going after me so they can control my aunt, I guess. I don't know."
The 52-year-old added, "I'm still at the house right now, and we're all puzzled at why we can't contact her and talk to her.
"She has attorneys that make sure her money is being advocated in the right way, and we also have an accountant that also looks at the bank statement, and it's gonna be strange when you look at those bank statements, you're gonna really see who's manipulating her with her money, and it's not me... I just can't understand why they're making these accusations."
Trent claims he has been paying Mrs. Jackson's bills for 15 years - a job he was given by her son, the late Michael Jackson: "That was my job - to be her driver, her provider, far as taking care of her, making sure she's taking her medicine, making sure she's going to the doctor," he states. "These are the things Michael told me to do for her, and I've been doing these things for her - very well, by the way... If some family members are still unhappy with the situation Michael made, and they feel like if they could control their mom the way that they want it... I would like to know what is it they're trying to do."