Mary-Kate Olsen is free to murder another young actor in his prime. (Please be Dane Cook. Please be Dane Cook. Please be Dane Cook.) Federal prosecutors have decided not to pursue a criminal case regarding Heath Ledger’s acquisition of prescription painkillers and sleeping pills, according to the AP:

Prosecutors in the U.S. attorney’s office in Manhattan had been overseeing a Drug Enforcement Administration probe into whether the painkillers found in Ledger’s system were obtained illegally. But the prosecutors have bowed out “because they don’t believe there’s a viable target,” said the official, who spoke on condition of anonymity because no charges have been filed.

And by “they don’t believe there’s a viable target” they obviously mean “Candace Cameron’s decapitated head arrived in a box this morning.”