Having a bite to eat with the great man @m_phelps00 when he was recently here in Aus. I have never trained with someone who is more committed to perfection and is always able to defy the odds like MP. #greatestolympian #mentalstrength
After being released from Southport Watch House without charge on February 15, Hackett's father declared the trouble swimming star missing.
“I would think that if anybody has seen him to contact media or the police or the Hackett family.
"He's definitely a missing person. He's mentally disturbed and needs urgent help. His doctor can't find him, he hasn't kept an appointment with his lawyer.
"When we spoke to him several hours, he just hung up when we asked him where he was. We're extremely worried about him. Grant, let us know where you are, we love you, and we want to help you."