A Polk County mother whose 11-year-old daughter was abducted and killed in 2004 died from a heroin overdose earlier this month.

Polk Sheriff Grady Judd said Susan Schorpen’s death is one of eight fatal overdoses being investigated in the central Florida County.

The 47-year-old woman died on April 10, AP reported.

Authorities said Schorpen’s daughter, Carlie, was abducted by Joseph Smith from a car wash. The six-day search in February 2004 captured the nation.

The girl's body was found in the woods behind a church less than three miles from where she was abducted.

According to AP, Smith is attempting to have his death sentence vacated. He was convicted of first-degree murder, sexual battery, and abduction.