Feldman claims he and his The Lost Boys co-star Haim, who died in 2010 at the age of 38, were both sexually abused as child stars in the 1980s, and is aiming to raise $10 million to make a film about the allegations.
But now, Haim's mother Judy has publicly slammed Feldman, saying the project, which has crowd funded $200,000 so far, is just an attempt to distract from his recent misdemeanour charge for drug possession.
Mrs Haim spoke to the Hollywood Reporter and said, 'He's been talking about revealing the names of his and other abusers for seven years, since my son died.'
'Now he wants $10 million to do it? Come on. It's a long con. He's a scam artist. If he was serious about this, he'd share the information he has with the police,' she continued. 'It's all a distraction.'
Ms Haim told the publication she does not believe there is a pedophile ring in Hollywood, but rather isolated incidents.
The Goonies and Stand By Me star slammed Mrs Haim on Twitter overnight, calling her a 'bad woman who vehemently protects evil.'
Another tweet read: 'God see all! There is no hiding when judgement day arrives. The truth's being revealed! The flood gates have opened and nothing can stop it!'
Feldman claims his fellow child star Haim was sexually assaulted when he was just 11, allegedly attacked by an unknown man on the set of 1986 film Lucas.
In Haim's book, Coreyography, released before his death, Feldman said Haim was told it was perfectly normal for older men and younger boys in the business to have sexual relations.
When Haim died in 2010, Feldman told ABC News: 'There’s one person to blame in the death of Corey Haim, and that person happens to be a Hollywood mogul. That person needs to be exposed but unfortunately I can’t be the one to do it.'
Feldman also told the ABC, 'There was a circle of older men that surrounded themselves around this group of kids. They either had their own power or connections to great power in the entertainment industry.'