(CNN) — It's a mystery more than four decades in the making. Two cars rusted, caked with mud and carrying as many as six bodies are pulled from the bottom of an Oklahoma lake.
According to CNN affiliates KFOR and KOCO, Custer County sheriff's deputies weren't looking for the cars Tuesday, but found them when Oklahoma Highway Patrol sonar equipment being used for another purpose revealed their location at the bottom of Foss Lake, a reservoir about 150 miles west of Oklahoma City.
Investigators say they believe one car may have belonged to a teenager who disappeared with two friends in 1970. The other car could be linked to the disappearance of a man in the early 1960s, media reported.
On Wednesday, investigators had recovered most of the remains from one vehicle and were expected by late morning to start working on the second vehicle, the Custer County sheriff's office said.
The Oklahoma chief medical examiner's office will examine the remains once they are removed from the vehicles and "will possibly try to match DNA of those remains with known surviving family members," the sheriff's statement said.
"There has been good response from the public in regard to this investigation which will allow for a good start for DNA testing," the sheriff's office said.
The Office of the Chief Medical Examiner cautioned Wednesday, however, that positive identification could take years. The office's anthropologist will examine the remains.
"Scientific identification of these remains will be attempted using anthropological and if necessary, forensic pathological methods," Chief Administrative Officer Amy Elliott said in a written statement. "Depending on the features of these remains and their state of preservation, identification can take anywhere from days to years. In some cases, if the DNA is degraded, positive identification using scientific means may not be possible.
"This is a very detailed and meticulous process that may take some time," Elliott said.
The town of Sayre was horrified after the three teens suddenly vanished one night in 1970 and nothing was ever heard from them again. It was just four years ago that residents held a candlelight vigil for the three teens, KFOR reported.
Police Chief Ronnie Harrold told CNN that local residents have been speculating and making up their own theories about what became of the three teens for the 26 years he's been there.
Debbie McManamman said she believes the older car, which appears to be a 1950s-era Chevrolet, contains the remains of her grandfather, 69-year-old John Alva Porter, KFOR reported. Custer County authorities told CNN on Wednesday that Sheriff Bruce Peoples wasn't available for comment.
"We never gave up, we always wanted some clue that somebody knew something," McManamman told the station.
"It's been very traumatic I can remember my dad having dreams at night and getting in the car as soon as he was off from his day job, taking my mom, and they would look and look and look any trace," McManamman said.
"I mean, he was just gone, " she continued. "No trace at all. His money was in the bank, his house was intact and he was gone. So over 40 years we've been looking for him.
"It's just a lot of mystery," she said.
Grandson Jim Porter believes his grandfather's two friends were inside the car with him, he told KFOR.
At the lake, Ervie Porter, the son of missing John Alva Porter, watched as investigators crawled around the cars. Now 85, the son suffers dementia and told KFOR that seeing what could be his father's car didn't conjure up clues about his disappearance.
"I just appreciate everything everybody has done to help," Ervie Porter said.
Peoples told KOCO on Tuesday that the other car, a 1969 Chevrolet Camaro, may have belonged to 16-year-old Jimmy Williams, a Sayre teenager who disappeared in 1970 with two friends: Thomas Rios and Leah Johnson, both 18.
Williams' brother, Gary, told a KFOR reporter off-camera that he felt positive that his brother's body has been found and that the discovery was finally made in God's timing, after so many local prayers.
The disappearances have long been part of local lore, Sayre resident Mandy Dunlap told KFOR.
"Everybody's just talking about it, you know, can't believe after so many years we're finding those vehicles in a lake," she told the station.
The three teenagers went missing the night of November 20, 1970, when they went for a ride around Sayre in Williams' blue Camaro with a white top, according to the Doe Network, a volunteer organization helping law enforcement in solving cold cases.
Williams was supposed to be going to a football game in Elk City, but he may have instead gone hunting on a road called Turkey Creek with Rios and Johnson, the Doe Network website said. The website includes photos of the Camaro and cites Williams' family as its source of information.
The three teens never returned home. The car was never found, and its vehicle identification number never surfaced on any databases. Williams' Social Security number was never used, the Doe Network said.
One anonymous tipster suggested the car could be in a river in an area called Markham Ferry in eastern Oklahoma, but nothing apparently came of the tip, according to the network's website.
The Doe Network draws attention to missing person cases by posting information culled from newspaper articles or provided by families and law enforcement agencies, network spokesman Todd Matthews told CNN.
Rios had just moved to Sayre from Oklahoma City with his mother and stepfather about four months before his disappearance, the National Missing and Unidentified Persons System website said.
Peoples told KOCO that he hoped the discoveries could help put families at ease about what happened to their loved ones so many years ago.
"It has real importance to the families to determine, so they can have closure and know what happened to their families and have remains and to go on with life now," he said.