Nearly a year after Amy Winehouse’s tragic death, her dad is speaking out against her ex-husband, who he blames for his daughter’s drug problems.

Last night, Mitch Winehouse revealed to Piers Morgan that his daughter’s ex, Blake Fielder-Civil, who was the inspiration for Amy’s 2006 album, Back to Black, was the one who introduced her to hard drugs.

In Mitch Winehouse’s new memoir, Amy, My Daughter, due out June 28, he writes: ”It occurred to me recently that one of the biggest-selling UK albums of the 21st century so far is all about the biggest low-life that God ever put breath into.”

On the show, Winehouse stood by his previous comment explaining that Fielder-Civil led to his little girl’s downfall.

“He introduced her to Class A drugs and she took to it like a duck to water,” he told the host.  

Though he does not blame Fielder-Civil for his daughter’s death, Winehouse does think he should take responsibility for her downfall.

“Whether she would have found her way to Class A drugs without him, who knows?” he said. “He ruined something beautiful—his words not mine…He stood up and said it was him, so, that’s who we point the finger at.”

Fielder-Civil is currently serving out a 32-month jail sentence for burglary and other offenses. He has not contacted Mitch since Amy’s death last July.

In his book, Winehouse writes about the other man in Amy’s life: Mark Ronson. The producer took the singer’s love of ’60s girl groups like the Shangri-Las to make the retro-inspired, Back to Black.

Mitch writes that her hit song “Rehab” started as just a conversation the two were having while walking the New York City streets. Amy mentioned, “You know, they tried to make me go to rehab, and I told them no, no, no.” Ronson then responded, “That’s quite gimmicky. We should turn that into a song.”

The two went back to the studio and Amy wrote the song in three hours.

Read more from Mitch’s book on Rolling Stone’s website and watch the video for “Rehab” below.

-Shannon Carlin, CBS Local