SPRINGFIELD -- This city’s most infamous unsolved crime is the disappearance of three women in June 1992.  Two teenagers and one mother vanished shortly after the students’ high school graduation.

  There were no signs of a struggle and no clues as to what happened to Sherill Levitt, her daughter Suzie Streeter, and Suzie’s friend, Stacy McCall.  Springfield police have researched and followed up on more than 5,000 leads in the case.  

  A woman from Springfield says she's done her own independent investigation and knows where the women are.  Police have doubts about her research and have spent nearly a year trying to verify her claim.

  For nearly 15 years, Janis McCall has been waiting for her daughter, Stacy, to come home.

  "I do believe Stacy still has a chance of being found.  They have not found any body.  They didn't find any remains for three women and, if they haven't found them in 14 and a half years, chances are they're still around,” she said.

  Still, faith that her daughter is alive can't overcome the dread she feels every time police find the body of an unidentified person.

   “For many times, every time a body was found around this area, my heart just stopped," said McCall.

  And it’s happened dozens of times.

  Investigator Kathee Baird wishes she could give McCall the happy ending she hopes for.  Last spring, Baird says she found evidence the women are buried under a parking garage near Cox South Hospital.  Psychics and tipsters kept telling Baird to look for the women in concrete.

  "I went back and researched projects that were going on in and around that time and kept coming back to the parking garage on Bradford Parkway,” said Baird.

  Baird provided KY3 News with video of a ground penetrating radar scan of the parking garage.  The man ran the radar, Rick Norland, is a consulting engineer who worked at Ground Zero in New York City and on the Panama Canal.  Norland says his machine picked up three distinct objects below the concrete.

   "It’s very similar to what we see when we're over old graves," said Norland. 

  Baird took the video to investigators.

  "We were told, on this lead, there was technology in use that had shown bodies underground,” said Springfield Police Sgt. Mike Owen.

  Baird also told Janis McCall.

  "It hurts, it really hurts, to be told that Suzie, Stacy and Sherill are buried certain places.  That's not something that's a positive for me.  It's a very negative feeling and I'd much rather be positive,” said McCall.

   Owen has been on the case since the day it happened.  With all the leads the case has generated, Owen was skeptical about the tip but, in such a high profile case, police say they have no choice but to follow every lead.

  "We could be embarrassed, we could miss something that could bring closure to the families, or we have to withstand public scrutiny,” said Owen.

  Acting on past tips over the years, police dug in two different places in Webster County and a place in Barry County.  Until they dig in the parking garage, Baird says she won't be satisfied.

  "We do know they dug in Barry County, and there was nothing there, on a tip.  Did it take a year to dig?  I don't think so," she said.

  Police say they've spent months on this lead.  They've met with the Greene County prosecuting attorney’s office and CoxHealth officials.  They even got an opinion from an expert on ground penetrating radar.

  "It would be impossible to see what this man claims he has seen,” said Owen.

Top CoxHealth officials say they've talked to police and told them they're willing to cooperate and told police they could do whatever they felt was necessary, including digging on their property.  Police say they've followed the lead as far as they can and have no plans to dig at the parking garage but Baird isn't giving up.

  "The only way I think I'm going to get anything done is to go public.  I've played by their rules for a long time,” said Baird.

  If police don't think a dig is necessary, McCall says she agrees.  She's spent the last 15 years listening to theories and tips that don't pan out.  More than 100 psychics have contacted her.

  “They say they're either alive or dead.  Well, yeah, they're going to be one of those things,” she said.

  But the Janis and Stu McCall don't think their daughter is dead.  Janis McCall has a faith that's unwavering and says, until there is definitive proof, she won't give up on Stacy.

  "They can say that they're dead, they can say that they're gone, but we always have hope.  One day, maybe, I'll know what happened to Stacy.  But, in the meantime, I can hope she is still alive,” said McCall.