Volunteers searching for missing Orlando mother Michelle Parker expanded their efforts Tuesday to focus on Daytona Beach, where a woman resembling Parker was sighted.

The 33-year-old mother disappeared on Nov. 17 after the airing of an episode of "The People's Court," where she and ex-fiancé Dale Smith appeared to settle a dispute over a $5,000 engagement ring.

Police named Smith as the prime suspect in her disappearance last week, but he has not been charged with any crime.

Based on a tip that a woman who looked like Parker was seen in Daytona Beach -- about 55 miles northeast of Orlando -- volunteers passed out fliers in the area Tuesday, the Orlando Sentinel reported.

Dale Smith was granted custody of his and Parker's 3-year-old twins on Nov. 30. Smith had been caring for the children since Parker's disappearance, but on Nov. 29 the Florida Department of Children and Families placed the children under the protective custody of Parker's mother Yvonne Stewart.

Parker's father strongly suspects Smith, who has so far refused to take a polygraph test, in his daughter's disappearance.

"Dale, he ain't called," Brad Parker told Fox News on Tuesday. "He wouldn't take a lie detector test. He's not even looking for Michelle."

He urged Smith to "come forward, tell the truth."

Brad Parker had even stronger words for Smith over the weekend, WTSP-TV reported.

"This goes to Dale: You're No. 1," he said Saturday at a fundraiser for search efforts. "You can't run and you can't hide. And we're coming after you."

"I know he did it. We just gotta prove it," he added, according to WTSP.

Newscore contributed to this report.