Gabrielle "Gabbiee" Swainson, 15, missing Columbia SC 8/18/12

[Lady Cop]

her pajamas

Richland County, SC (WLTX) - Richland County Sheriff Leon Lott is asking for the public's help to get them more clues in the disappearance of 15-year-old Gabbiee Swainson.

Lott updated the case at a news conference Thursday morning, where he admitted he's frustrated by the lack of cooperation from the suspect, 52-year-old Freddie Grant.

"I'm appealing to him, monster that he is...for God's sake tell us where she is," Lott said. "He can stop the pain and the tears in Gabbiee's mother's eyes. He's the one who can do that."

He said Grant has refused to talk, and will only allow investigators to talk to his public defender. Despite the setback, Lott said his officers are doing everything they can on their own to find her.

"We continue to operate that Gabbiee is alive and well, and we have to find her," Lott said.

To that end, Lott released a photograph of the pajamas they believe Gabbiee may have been wearing when she was taken. He also released that Swainson was driving a 1992 Ford Escort that was light blue in color. He said his officers have that vehicle, but they're asking anyone to come forward that may have seen it driving around the area on the days since Gabbiee was reported missing.

Lott said this week they found Gabbiee's blood on duct tape and other DNA evidence linking him to the crime at Grant's home.