The man and his two children who died when he drove off a wharf at Port Lincoln on Monday had suffered gunshot wounds, the police say.
Damien Little died with his sons Koda, four, and Hunter, 10 months, when he drove off the wharf into 30m of water in Port Lincoln, South Australia.
Superintendent Paul Yeomans said autopsies had been completed and confirmed the gunshot wounds suffered by 10-month-old Hunter, four-year-old Koda and their 34-year-old father.
Police had previously revealed that a rifle was recovered from Little’s car.
Yeomans said domestic violence and mental health would form part of a report to the coroner when the investigation was complete.
Little’s wife Melissa released a statement on Friday saying words could not express the pain she had been feeling since the deaths.
“Damien was my childhood sweetheart who became my loving husband,” she said. “He was also a father who loved his two children very much.
“Damien valued and appreciated our close-knit family, he put us first, we were his whole world,” she said.
His death had “left a huge hole in my heart”.
“My two precious boys have left this world way too soon and my heart is broken,” she said. “I shall miss them and think about them each and every day.
She said she wanted her husband to be remembered as a “well respected and valued member of our family and our community”.