Princess Beatrice, 17, and her parents, Prince Andrew and Sarah, Duchess of York, were warned this weekend of the alleged unsuitability of her new boyfriend, Paolo Liuzzo.

Liuzzo, 24, described as an American socialite, is said to be Beatrice’s “first real boyfriend”. He has just returned from a skiing holiday with Beatrice and her parents, who apparently approve of the romance.

Kevin Haskell, a Wall Sreet investment banker, has told a British national newspaper that Beatrice’s family should be aware that Liuzzo has a criminal record in the States that could easily have involved manslaughter.

Haskell described how he watched his friend die in a brawl with Liuzzo. “Paolo is seven years older than Beatrice. That is a big age difference for someone as young as her. I would hate for someone like him to tarnish her.

“When I heard he’s been to Verbier with the Royal family it made me feel sick to my stomach. My friend Jonathan will never get to go skiing. He will never get to have a girlfriend, let alone a Royal one.

“I hope Beatrice and her parents know what sort of man she’s involved with. He might say he’s changed, but I don’t believe him. Is this the sort of person the Royal family wants in their midst? I saw him in court and I didn’t see any genuine sorrow or remorse.”

Liuzzo claimed the death was “a horrible accidents” and that he has changed since the days when he was off the rails.

Beatrice seems to have inherited her mother’s flair at picking men.