In an open letter to her 26-year-old daughter via HollywoodLife.com, he blamed all her problems to her addictions and pleaded with her to return to rehab -- for a sixth time.
"Do I believe Lindsay the new reports that Lindsay is drinking two litres of vodka a day? I believe she's drinking to drown her sorrows. When I was at the Chateau Marmont I saw bottles. People tell me what she's doing," he wrote.
Michael also agreed with US chat show hosts Kathie Lee and Barbara Walters that Lindsay's life could end tragically.
"I have the same fears. Why is it okay for them to talk about Lindsay and not me? I'm her dad," he added.