Detectives have followed leads about Flack’s whereabouts, even traveling to Lexington, Ky., but have not found anyone who has heard from the 30-year-old, according to Cunningham.
Flack is described as white, 5 feet and 9 inches tall and weighs 110 pounds, with brown hair and brown eyes.
Both Flack and English, like Bogan, were known to police for drug use and prostitution, Cunningham said.
“That lifestyle means people can disappear for a while,” he said, but added their families are concerned about them and detectives want to find them.
English made it known to others she was helping police in their investigation of Bogan’s death, Cunningham told the Journal-News.
He said English’s disappearance may be connected to the Bogan case, but Flack’s is not.
“There’s not someone out there responsible for all of them,” he said.
Anyone with information about the whereabouts of either woman is asked to contact Middletown police at 513-425-7737.
Detectives continue to investigate Bogan's death as a homicide and are awaiting results of DNA testing after searching a a residence on Woodlawn Avenue multiple times for evidence that Lindsay Bogan died in the basement of the home, this news outlet has learned through newly released documents related to the case.
“We believe she was killed in the basement of 1504 Woodlawn Avenue and was later taken to Madison Twp.,” Middletown police Lt. Jim Cunningham told the Journal-News.
Detectives believe Bogan may have been dead in the house for about a week, before her body was moved, he said.