Heath Ledger Drug Use Led to Death? Michelle Williams Took Heath To Promises Rehab

For three years, Williams was a firsthand witness to the gifted actor's use of alcohol and drugs, including cocaine, heroin and "a variety of pills," says a Ledger confidant. In March 2006 – just weeks after the couple walked the Oscars red carpet and when daughter Matilda was only five months old – Williams drove Ledger to Promises Treatment Center in Malibu, California, the confidant tells Us Weekly. Ledger refused to check in, instead swaying her with a pledge to clean up. Even after the couple realized "they were in way over their heads," according to a source, and split in September 2007, two sources tell Us that Williams demanded Ledger be drug-tested before his visitations with Matilda.When news of Ledger's death broke last Tuesday, Williams was inconsolable. "She cried and screamed as soon as she heard," a source on the Swedish set of her latest film, Mammoth, tells Us.