A pupil fighting expulsion from a public school had an "appalling" behaviour record and once told a police officer he was "scum", a court heard.
Russell Gray (left) claims his son was unfairly expelled
The incident was raised at Southampton County Court where Russell Gray, 49, claims the expulsion of his son, Rhys, by Marlborough College was unlawful.
Mr Gray claims his son was expelled from the £22,000-a-year public school to protect its league tables standing.
But the College has described the teenager's behaviour as "appalling".
The court was told Rhys, who was then 13, was arrested in Chelsea, London, in July 2003 and charged with being drunk and disorderly.
The police report said a Pc Nigel Martin found him collapsed on a park bench with a friend but the pair were arrested when the teenager became abusive.
Pc Martin told him: "Your behaviour is an absolute disgrace.
"I'm horrified that a 13-year-old boy would speak to anyone in such a disgusting manner, never mind a uniformed police officer."
A subsequent letter from Kensington and Chelsea social services to Mr Gray expressing concern about the teenager's arrest was also submitted to the court.
A social worker said Mr Gray appeared "disinterested in attending the police station and court with your son".
The social worker described this as "concerning".
The case continues.