The Associated Press claims Thomas Wayne Markle Jr was "visibly intoxicated" when pulled over in his auto at 1.30am on Friday morning - and was taken directly to a "detox centre".
The female police officer has never been named for security reasons, but she was the bodyguard who was photographed leaping into action during a security scare in Fiji during the couple's royal tour a year ago.
The woman, who was pictured defending the Duchess of Sussex during her Fiji trip after a security scare, was described as brilliant by colleagues.
The 52-year-old relative of the royal was arrested for driving under the influence by Oregon State Police at 1:33 AM, and then taken into custody. Authorities said his blood-alcohol content was 0.11 percent, above the legal limit of 0.08 percent.
Yet Harry and Meghan's recently appointed bodyguard is to quit her role in what some see as a worrying trend.
Thomas Wayne Markle Jr is facing a drink-driving charge after he was arrested in OR, state police have said.
And it seems she's gone to great lengths to welcome both Kate and Meghan into one of the world's best known families.
Kensington Palace did not immediately return Fox News' request for comment on the staffing changes.
A third insisted: "We have more important things to worry about than this".
"Absolutely I think our wedding will bring the family closer together", Thomas told The Daily Mail when asked if he'd be extending an invite to his half-sister.
The Queen has been captured on camera having some relaxed moments with both her grand daughters in law, Kate Middleton and Meghan Markle. But she must be wondering what her new in-laws make of all these stories.