OAK BEACH, Long Island (PIX11) -- It has been nearly three years since 24-year-old Shannan Gilbert's remains were discovered in a marsh in Oak Beach.
On Thursday, her family's attorney John Ray laid out a portion of the body of work he has amassed.
"We've developed a body of evidence that strongly suggests we're on the trail of the killer," Ray said.
It's a murderer who Ray views as not only responsible for Gilbert's death but as well as others.
Gilbert's disappearance sparked a search that uncovered a dumping ground of human remains along Ocean Parkway.
Remains of a total of ten women have been found along the south shore drive.
"We believe that the killer is the same killer of Shannan as of the other women and people found along Ocean Parkway."
On Wednesday, an autopsy on the Jersey City woman detected no drugs in her system at the time of the examination, according to a report obtained by Newsday.
The results of Gilbert's autopsy also showed she had the tips of several fingers and toes missing. But the cause or manner of Gilbert's death was "undetermined."
Gilbert, a call girl who advertised on Craigslist, was last seen in this isolated section of Long Island in May of 2010 and Ray says he has pinpointed the last person to see her alive.
"There is not one particular piece that is the ultimate piece of evidence that points to this person of interest," Ray said. "But there is an overwhelming number of other pieces."
Pieces that Ray has gathered through a wrongful death lawsuit he has filed. The lawsuit has allowed him to take hours of depositions from those who came across Gilbert in the final minutes that led up to her disappearance and provide crucial facts to the case.
However, Ray says there is no interest in his evidence from the Suffolk County Police Department.
"If I were dealing with a police department that wanted my evidence he probably at this point would be detained."
In fact, Ray did not pull any punches in his summary of the investigation.
"The police investigation on this whole matter has been disgraceful, they have overlooked, ignored, disregarded all kinds of very powerful evidence in this case."
When pointed out that disgraceful is a heavy characterization, Ray simply said, "Yes, disgraceful is what I would call it."
PIX 11 News reached out to the Suffolk County Police Department who provided the following through a statement.
"The Suffolk County Police Department is not commenting further at this time on the Gilgo investigation until/unless we have some additional information pertaining to the investigation that serves the investigation or the public by its release."