LOUISVILLE, KY. (WDRB) -- Floyd County Prosecutor Keith Henderson says he will not charge William Gibson with a third murder until the final cause of death for that victim is released.

Henderson met with police Monday after investigators dug up a body Friday evening in Gibson's back yard. That body is believed to be the accused serial killer's third victim, Stephanie Kirk.  The 35-year-old Charlestown woman had been missing for about a month.  The coroner says it appears she was strangled.

Authorities say Gibson is also responsible for the deaths of 75-year-old Christine Whitus of New Albany, and the 2002 murder of Karen Hodella.

Detectives from other jurisdictions are watching the ongoing search, as they pursue leads in missing persons cases. 

If convicted of the current charges against him, Gibson could be sentenced to 160 years in prison.

Gibson's hearing last week on the two murder charges was sealed by a Floyd County judge.  Henderson says investigators believe Gibson acted alone in the two alleged murders.

Because of the community interest, Henderson says he may hold daily press conferences to give updates on the case.

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