Thomas has told The Mail on Sunday that Jose Sandoval, the former boyfriend of his close female friend, Lori Davis, has threatened to kill him.
Sandoval, 49, allegedly drove past Thomas' house in Rosarito Beach, Mexico,and shouted at the retired TV lighting director, 74, "I'm going to kill you, you fat f****r."
However, Sandoval has denied the death threat claims.
Thomas told The Mail, "The first time he threatened me was after I took my friend and her daughter for pizza and we were photographed by the paparazzi.
"He texted me saying, "I will kick you a, you fat f****r."
"I wrote back saying, 'You don't even know me, what's wrong with you? Why would you feel threatened by a 74-year-old man?"
Sandoval has denied Thomas' allegations.
Sandoval has allegedly been terrorizing Davis, 38, and her 11-year-old daughter Jocelyn, who calls Thomas "Uncle."
Thomas paid for Davis and her daughter to move to a "safe house" after the alleged abuse got worse.
Sandoval reportedly is a construction worker who was allegedly jailed for 30 months in the United States for illegally entering the country before being deported in 2000.
Thomas, who wasn't able to attend daughter Meghan's wedding, contended in the new interview, "He thought something sexual was going on between Davis and me but it's not. She isn't my girlfriend. She hasn't hustled me for money.
"I've helped her financially so that she could get to a safe place to live with her daughter."
The Mail found that a police report exists in which Davis made a complaint against Sandoval.
Davis claims in the report, "He (Jose) grabbed me by the neck while twisting it, as if he was choking me and I have pictures of these aggressions.
"He spat on my face.
"He goes to my uncle's house (referring to Tom) and tells him that he is going to kill him because he is constantly hiding me and threatens and insults him."
Last Monday, Davis filed for an order of protection against Sandoval with police in the Mexican city of Tijuana.
"Tom has been nothing but a supportive friend. He's been a rock for me and my daughter and I'm sorry he's been dragged into this violent and abusive situation," Davis told the British publication.
"He's the most genuine and kind person I know and the most stable male figure my daughter has ever known. My ex-boyfriend is demented. He has threatened to kill me and my daughter multiple times and has made multiple threats to Tom's life."
While Sandoval said, "Thomas is lying" about his threat claims, the construction worker did confirm that he once gave Davis two black eyes, saying: "I did hit her. She deserved it."
The Mail reported that Sandoval also admitted he was deported from the U.S. and spent 30 months in jail but said, "From the moment I came back to Mexico I've worked hard."
Radar readers know that Thomas was banned by the royal family after his bizarre behavior and incendiary public statements.
Among other outrages, Thomas gave an explosive interview to The Sun in which he said he believes his daughter is smiling through the pain and pressure of being part of the Royal Family after marrying Prince Harry.
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