MOSS BLUFF, LA (KPLC) - It was a person walking on John Koonce Road in Moss Bluff that discovered a woman's body on the morning of Nov. 23, 2009.
It was a challenging case from the beginning. It took investigators more than 10 hours to identify the victim.
"A case like this is really frustrating," said Lt. Les Blanchard, Calcasieu Parish Sheriff's Office Violent Crimes Division.
Blanchard has been investigating violent crimes for 14 years and said this case was at a standstill until fingerprints identified their victim as 19-year-old Sierra Bouzigard.
"In a case like this, where it took us so long to identify the victim - we got a late start on things. Anybody who may have been involved who has access to leave - can leave," said Blanchard.
An autopsy revealed Bouzigard died from blunt force trauma to the head. Other answers to how she ended up on the side of the road have been harder to come by.
Investigators were able to determine that Bouzigard was last seen a couple of miles away at an apartment off Victoria Drive in Moss Bluff between the hours of midnight and 2 a.m.
While there have been a lot of dead leads, Sheriff Tony Mancuso believes a break in their case was collecting a full DNA profile from evidence at the scene.
"There is no question DNA is one of the best pieces of evidence you can have, especially in a case like this," said Mancuso.
Over the last three years, they've been searching for a match swabbing more than a hundred people, including a dozen illegal immigrants who were last seen with Sierra just hours before her body was found. All were cleared through DNA.
"We've taken a lot of samples of DNA from people and nothing has panned out yet," said Mancuso.
While Mancuso will not rule out other possibilities, he strongly believes the truth of what happened to Bouzigard lies with the illegals.
"We took polygraphs of several of them. I would lean towards the illegals. And I would lean towards that person has fled our area and that's why we have been handicapped with being able to come up with anything conclusively," said Mancuso.
Now a cold case with no new information coming in, investigators can only wait as the key to solving the mystery is sitting in a national DNA database for criminals.
"If this person is this violent. Then there is a good chance they are going to commit another crime and hopefully again that will surface at some point. If they do, it will be placed in the database and come up as a match for this case. I believe it will help solve this crime one day," said Mancuso.
In addition to the Crime Stoppers reward money, Bouzigard's family put up an additional $10,000 for information leading to the arrest of her killer.