Remains believed to be missing 20-year-old Michelle McCoy were found Thursday night in a Northside lot about two miles from her home, Jacksonville Sheriff John Rutherford said.
Police had searched the vacant lot behind an assisted living facility in the 3900 block of Ribault River Lane off Winton Drive since getting a tip before dawn Thursday.
"I can't go into the details of what we have found here at the scene," Rutherford said, saying it was a large and complicated crime scene. "Tonight our thoughts and prayers are with the McCoy family."
It was the second search in two days for the woman who had been missing for weeks.
Rutherford, who addressed the media about 10 p.m., said he could not release many details because he said that could hamper the investigation.
Rutherford said no one has been arrested in the killing, but he added that the public is not in danger because investigators believe McCoy was the target of her killer.
McCoy was last seen Jan. 10 and was reported missing by family members three days later.
A witness said he saw a woman believed to be McCoy being forced into a silver minivan near a lounge in the 8900 block of Washington Ave, not far from her Northwest Jacksonville home the night she disappeared. The witness said he recovered a shoe, rope and other evidence that led him to believe the woman was being kidnapped.
The abduction outside a Northside lounge happened minutes after McCoy was last seen by her twin sister getting into a minivan at her home in the 4800 block of Churchill Road. She asked her sister to call her minutes after she left, but McCoy never answered her phone.
Jacksonville police linked the two cases together about two weeks later.
McCoy's family has searched abandoned houses and knocked on doors in the Sherwood Forest neighborhood to see if anyone has any information about the abduction.
Anyone with information on McCoy's killing is asked to call the Jacksonville Sheriff's Office at 904-630-0500 or Crime Stoppers at 866-845-TIPS.