Investigators say they believe one car may have belonged to a teenager who disappeared payday loans online two friends in 1970, and the other car could be linked to the disappearance of a man in the 1960s who a federal official says was with a sibling and a friend, officials payday loans online CNN and its affiliates KFOR and KOCO.

JUST WATCHEDCars found in lake may be from cold casesReplayMore Videos. Cars found payday loans online lake may be from cold cases 01:53Darrell Splawn, a diver with the Oklahoma Highway Patrol, was sent down on Tuesday, one week after the sonar located the corroding vehicles. They were right next to each other, at a depth of 12 feet and 50 feet from a marina. Visibility was almost nil. He, like others, had no idea how the vehicles -- which faced in different directions -- came to be in the lake.

It could have just been a shoe," the trooper told CNN on Wednesday. Skeletal remains were seen when the car was brought to shore. Now authorities are trying to positively identify the remains, a process that could take years, and try to learn what happened. So much time has passed in the two cases that the son of one missing person is now 85 and struggling with dementia. Custer County Sheriff Bruce Peoples told KOCO that one of the cars, the 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.

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.

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. Sayre residents were horrified after the disappearances and held a candlelight vigil for the teens as recently as four years ago.

Debbie McManaman said she believes the older car contains the remains of her grandfather, John Alva Porter. Porter, then 69, was traveling in a green Chevy with a sibling, Alrie Porter, and friend Nora Marie Duncan, 58, on April 8, 1969, when they all went missing, said Mike Nance, regional system administrator for the National Missing and Unidentified Persons System.

There are a lot of things in between there we can't answer, because we don't know," McManaman told CNN on Wednesday. He just walked away.

Now 85, the younger Porter suffers from dementia. After the two cars were pulled out, dive teams with the Oklahoma Highway Patrol scoured the lake bottom again. After thorough searches, both vehicles were towed away Wednesday evening. Trooper George Hoyle was operating the sonar equipment that last week spotted the two vehicles.

Foss Lake is down substantially because of a drought and that could have been a factor in the discovery, officials said. Taken: The oldest cold case ever solvedThe 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," a Custer County Sheriff's Office statement said. The remains will be first evaluated by using any identification cards, jewelry and teeth found on the bodies, said Chief Medical Examiner Eric Pfeifer.

A muddied wallet, a purse and two corroded rifles were among the items recovered. Authorities cautioned Wednesday, however, that positive identification could take years.

The state anthropologist, Angela Berg, will examine the remains. In some cases, if the DNA is degraded, positive identification using scientific means may not be possible. Evidence in killing of former beauty queen points to ex-priestIn December, state anthropologist Berg coincidentally began looking into the cold case of the Porters and Duncan and then contacted Nance after she discovered that another cold case existed about a second vehicle with three missing teens in payday advance the same area, Nance told CNN.

When authorities discovered the two cars and remains of six people, Berg called Nance for information on the six missing persons, which the National Missing and Unidentified Persons System maintains, he said. NAMUS recently coordinated with law agencies the collection of DNA from the family of Duncan, the woman who went missing along with the Porters, and the federal agency posted her name on its website, Nance said.