Investigators announced their decision to drop the case of how Heath Ledger got the two powerful painkillers that contributed to his death. The Drug Enforcement Administration (DEA) was trying to establish whether the oxycodone and hydrocodone found in Ledger's system at the autopsy were attained through false prescriptions.

This part of the DEA investigation would have involved Mary-Kate Olsen, who issued statement through her attorney in which she underlined the fact that she had "nothing whatsoever to do with the drugs found in Heath Ledger's home or his body, and does not know where he obtained them." According to some anonymous sources, Olsen wouldn’t have wanted to talk to federal agents unless granted immunity for any possibly illegal activity, and a subpoena was reportedly headed her way.

Numerous conspiracy theories were ignited by the fact that Ledger’s masseuse, Diana Wolozin, the first one who found the actor’s dead body, called Olsen three times from Heath’s phone (he had her on speed dial) before she called 911. It is not known yet whether Wolozin managed to reach Olsen on her phone and speak.

However, despite the fact that Olsen’s lawyer has told authorities that his client told investigators all she knew and that she "does not know the source of the drugs Mr Ledger consumed", the DEA had obtained a subpoena that could have forced Olsen to speak out, but it is no linger valid because the case was dropped.

The only way through which the case could be revived would be if evidence of a crime would emerge.