Report: Officials Close Investigation Into Heath Ledger's Death

Mary-Kate Olsen is off the hook.

The U.S. Attorney’s Office investigation into the death of “The Dark Knight” star Heath Ledger has been dropped, according to a law enforcement official who spoke to the Associated Press.

Authorities dropped the investigation “because they don’t believe there’s a viable target,” the official told the AP.

[ Mary-Kate Olsen Dodges DEA Questions - Play it Now ]

As previously reported on, the federal Drug Enforcement Administration office in New York had obtained a subpoena in an attempt to force Mary-Kate Olsen to testify in front of a grand jury, as part of their investigation into Ledger’s death.

Authorities had been attempting to understand how Ledger acquired OxyContin and Vicodin without a legal prescription.

Olsen was the first person called by the masseuse who discovered Ledger’s lifeless body in January in his New York City apartment.

[ All Access: Heath Ledger - News - Mary-Kate Olsen ]

Olsen was reportedly seeking immunity before speaking to the DEA.

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