Ohio Residents are searching for clues to find out what happened to six missing women.

Four of the women are dead, and two have been missing for months, ABC News reported.

Residents are afraid that there may be a serial killer, but, police said the women's troubled past may have caught up with them, although they have not ruled anything out. All of the missing women were drug addicts and some were prostitutes.

Meanwhile, the women are linked to each other because they ran in the same circles.

"There's that one person out there that has the information that's going to break this case. We know that, we just have to get to them," Chillicothe police officer Bud Lytle said.

Police are looking for one woman named Wanda Lemons. The 38-year-old mother of five has been missing since last fall.

Charlotte Trego, a 28-year-old drug addict, went missing in early May 2014. Her mother said she may have turned to prostitution to feed her habit.

A couple of weeks after Trego went missing, 30-year-old Tameka Lynch, a mother of three, disappeared as well. A group of kayakers found her body on a sand bar four days after her death.

Another missing woman, Shasta Himelrick, was found dead last December. The coroner ruled her death as suicide after finding traces of painkillers and cocaine in the pregnant woman's system.

Tiffany Sayre went missing in early May. The 26-year-old's body was found near the same location where kayakers found Lynch.

Authorities believe the six missing women in Ohio have cases mainly connected to drug crime and prostitution.