WHEN the Sydney radio host Ray Hadley opened his Kenthurst home to more than 60 students on Friday night, it was always likely to be a boisterous affair.
The teenagers - all friends of Hadley's daughter - were in celebration mode having just attended their year 12 formal at Hills Grammar School. When they arrived at the celebrity broadcaster's home, many were carrying alcohol.
Within hours the graduation party had turned ugly: Hadley's electric front gates were allegedly kicked off their hinges and there were several heated exchanges with a drunk student believed to be responsible.
NSW Police confirmed an investigation had been launched after a complaint from a 17-year-old boy relating to the 2GB presenter and his son, Daniel, who is a police officer.
The boy alleges he was assaulted by both men. Hadley's camp has described his account as ''absolutely ridiculous''.
The Sydney Morning Herald understands the police are also addressing counter claims by the Hadleys that the teenager might have been responsible for property damage and the assault of an off-duty police officer.
According to the boy's statement, lodged at Castle Hill police station and obtained by the Herald, Hadley's daughter posted a Facebook event online about a month ago, inviting fellow students to her family's house at Kenthurst for a ''year 12 after party''.
When the school's formal dinner ended about 11.30pm, students began making their way to the Hadley residence.
By 2am, the boy - who had arrived with a large hip flask of whisky - was, by his own admission, ''pretty intoxicated''. His statement said: ''That's when everything started to unfold.''
After falling to the floor, the teenager claims Daniel Hadley kicked him while he was trying to get up. A series of verbal exchanges with Daniel Hadley and two other off-duty police officers allegedly followed.
The teenager then alleged: ''I felt my head being hit from behind. I turned around and saw Ray Hadley standing right behind me. He was that close, he was almost touching my shoulders.
''As I turned around he grabbed my shirt by the right shoulder, lifted it up, scrunched it in his hand and it nearly choked me. He said words similar to: 'You're out of here, you little turd.'''
The student said that, while Ray Hadley was dragging him down the driveway by his shirt, he continued: ''Shut your f---ing mouth … say one more word … I'll roll you.''
As they reached the end of the driveway, Ray Hadley then allegedly let go of the shirt and said: ''There's the gate. Use it.''
According to the boy's statement, Ray Hadley returned a short time later, yelling words similar to: ''One of you little c---s broke my gate.''
The boy denies damaging any property.
The broadcaster was not available for comment. He was in hospital yesterday undergoing tests after reportedly contracting pneumonia while at the Olympics in London.
However, Hadley's lawyer, Peter Dawson, said any claims that Hadley or his son had acted violently were ''absolutely ridiculous''.
''These students arrived back there after midnight and Ray's instructions were that only those over the age of 18 were allowed to drink.
''This boy was heavily drunk and there are numerous witnesses that will confirm that Ray acted nothing but appropriately. They will also confirm that the boy assaulted an off-duty police officer.
''He was escorted off the premises for both the assault and for his foul language. That's when we believe he took his revenge out on the gate.''
A NSW Police spokesman said that, as the investigation was continuing, ''it would be inappropriate to comment further''.
At least one other student is known to have provided detectives with a formal witness statement backing the boy's version of events.