His mother Jackie Rafter is a well-known socialite, model and founder of the Bubblegum charity.
The couple separated after five years in the early 1990s and have now divorced. David has remarried.
Their son, of Coppinger Glade in Stillorgan, appeared before Dun Laoghaire District Court charged with seriously assaulting Yaroslav Kovshikov.
The court was also told that he was caught with two bags of heroin at Marlborough Street, Dublin 1 on March 2, 2012, and that he stole a Nike tracksuit worth €102 from JD Sports in Dundrum Town Centre on December 4 last.
Garda Sergeant Peadar McCann said: "He was selling two bags of heroin with a value of not more than €200."
The judge said the alleged assault on the Luas at Balally, Dundrum on July 8 must have been extremely frightening and upsetting for the victim.
However, Marshall told the court he was headbutted first, claiming that CCTV coverage will prove this.
Outlining the allegation for the court, Sgt McCann said Mr Kovshikov, who turns 19 this year, was on the Luas with a friend when he was approached by Marshall.
Sgt McCann claimed Marshall got the teenager in a headlock, headbutted him and repeatedly punched him.
The sergeant alleged the teenager suffered a number of blows to his face and body.
When gardai arrived on the scene, it is alleged that Mr Kovshikov was bleeding down the left-hand side of his face.
He also suffered bruising and marks to his face.
Judge Reilly said she would accept jurisdiction of the allegation, meaning the matter will be disposed of in the district court.
The judge adjourned the matter for six weeks to a date in June.