Speaking to The Sun, the former black cab driver claims that while Fielder Civil may have introduced Amy to hard drugs, her death was a "horrible accident."
When asked about Blake, Mitch explained: "I blame him for a lot of things. He started her on the road to hard drugs. But her death was a horrible accident. It was her responsibility."
He continued: "She was told that if she detoxed without medical intervention, this whole thing could happen. He started her off on the road to drugs. But I don't blame him for her death."
The 60-year old, who plans to launch The Amy Winehouse Foundation tomorrow, then went on to state he believes Amy died of a seizure, despite no actual confirmation of her death being made.
Mitch admitted: "She had seizures because she would binge drink and then stop. She had one in a hotel room in New York once when she was on Skype to a friend."
"She conked out in front of him. I had to ring hotel security and they rushed in there. She had that history. We won't know until the outcome of the inquest, but that's what we suspect was the cause."
Amy's dad also previously confessed that the Back To Black singer would have married her boyfriend Reg Traviss and wanted to start a family with him.
Mitch told The Sun: "When Reg came on the scene, he was a breath of fresh air. I believe they would have married,"
"She wanted to have children and what nicer person to have them with than Reg. His manners are from a bygone era. He looked like my dad in the 1940s. "
He added: "It is so sad they never had the life they planned. They would have been on holiday now, for Amy's birthday."
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