Former Olympic swimming champion Grant Hackett has been arrested on the Gold Coast after a "disturbance" at his parents' house on the Gold Coast.
Hackett's father, former police detective Neville, called police to his Gold Coast home around noon Wednesday after two-time Olympic 1,500-meter freestyle champion became agitated and aggressive.
The brother of Grant Hackett says his family is at the "end of the road" in their struggle with the Olympic swim star's deteriorating mental health and is pleading for help.
"From a mental health perspective I hope something can be done".
"Grant's got a medical problem and it manifested itself here this morning. he was raving and ranting a bit", Neville Hackett told the newspaper.
"This is a completely different person", Craig Hackett said. I don't know this person, my mom and dad don't know this person.
Last April, he publicly apologized for a drunken incident on a flight home from the Australian Olympic trials when he was accused of groping a male passenger who reclined the seat in front of him.
"He's been receiving treatment from a doctor. A deep sense of shame, guilt, embarrassment, of regret, I am so sorry for my actions and the people it has impacted", he said.
"It's coming to the point now where he's unsafe".
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"We decided he needed some treatment but there was no way he was going to go and get treatment this morning, so we called the police".
Hackett retired after his near miss at the Beijing Games but made a comeback at 35 past year in an unsuccessful bid to make the Rio Olympics.
In 2014, he was filmed wandering through the Crown Casino in Melbourne in only his underwear claiming he was looking for his young son.
'We'll support him the whole way, ' he said.
Following Hackett's release, his brother told the media Hackett was not his usual self. Westpac dumped him as a brand ambassador after the incident, while a children's charity also cut ties.
Hackett traveled to the United States in 2014 to undergo treatment for a dependency on the sleeping medication Stilnox.
He allegedly "smelt of alcohol" during the flight, and was questioned by Australian Federal Police over the matter.
"Channel Seven, which has filmed a handcuffed Hackett being driven away in a police auto, tweeted that witnesses are claiming Hackett was "'going off' and stabbing a knife into a chopping block".