Report: No drugs in Shannan Gilbert’s system

More information has been released nearly four years after the disappearance of Shannan Gilbert led police to discover human remains at Gilgo Beach.

Though the Suffolk County Medical Examiner's Office has never publicly released Gilbert's autopsy, News 12 Long Island has obtained a copy. The autopsy found no drugs in the 24-year-old prostitute's system when she vanished in 2010.

Police speculated an "erratic phone call" made from Oak Beach on the night she went missing may have been drug induced. Investigators suggested at the time that Gilbert may have accidentally drowned in the marsh.

The autopsy found Gilbert was missing the tips of fingers and toes, as well as part of the bones near her throat, but the cause of her death remains "undetermined."

In the report, the Suffolk County medical examiner does make a note that her missing fingers and bones could have been taken away by animals in the marsh during decomposition. Experts also say that evidence of short-term drug use would not show up in hair or bones, which is what was tested.

The search for Gilbert led to the discovery of 10 other sets of human remains, believed to be victims of the so-called Gilgo Beach killer.

The Gilbert family is suing Dr. Peter Hackett, a former Suffolk police surgeon, who lived in Oak Beach, for medical malpractice. One of their attorneys says subpoenaed phone records prove that Hackett called Gilbert's mother two days before her death to say that he was treating her at his home as part of a program for "wayward girls."

Hackett himself told News 12 in an April 2011 interview that he had nothing to do with Gilbert's death. He did not return calls for comment on Thursday, but his attorney says Hackett never treated or even met Gilbert.

Suffolk County police would not comment on the investigation.