Injuries suffered by an Oklahoma teenager don’t appear to be “possible.”

(NewsNation) — The brother of a 19-year-old Oklahoma teenager found dead along a country road says he can’t reconcile the idea that no one knows what happened, suggesting there was a cover-up could come.

Dailen Presgrove told NewsNation Prime in a Sunday interview that the scene where his brother Noah’s body was discovered did not match the original account of a hit-and-run accident. “With some of these injuries, it just doesn’t seem possible that he would have fallen out of a car.”

“There were no tire tracks on the road, there were no car parts on the road, his teeth were right next to his face,” Dailen Presgrove said. “If he had been hit by a car going 65 to 70 miles per hour, it just doesn’t make sense that the situation would have been that way.”

Presgrove’s body was discovered wearing only shoes on Labor Day 2023 along a rural stretch of US 81 in Jefferson County, Oklahoma. His family says he was last seen alive at a party he attended with a group of friends. The teen had a collapsed skull, road rash on his hip, gravel rash on his shoulder, multiple bruises and scattered teeth.

While the Oklahoma Highway Patrol said this week it is no longer investigating Noah Presgrove’s death as a homicide, his brother believes an accident or “some other sinister situation occurred that is now being covered up.”

Presgrove urged anyone who knows anything, including potential private investigators, to come forward.

“Whether it’s your own story or a friend’s story, we please encourage you to reach out to us, to the OHP, to … anyone who just reaches out with a message,” he said. “As time continues to pass and these interviews continue, I know it must be eating her up inside.”

A former FBI agent questions why the investigation into his death isn’t being treated as a murder case.

“That doesn’t make any sense,” Jennifer Coffindaffer said Sunday on “NewsNation Prime.” “I see…there were a lot of people with information. What did they say that would make (police) believe it wasn’t something more insidious?”

Coffindaffer mentioned the strange circumstances of the case, including an ATV accident Presgrove was involved in before his death, as well as “writings that were actually made on his body and then removed” and his teeth located just feet from his body were.

“So many unanswered questions,” she said. “I’m so surprised that after eight months, law enforcement hasn’t focused on who the suspects might be.”

“If it’s not a murder, there’s no reason for law enforcement not to discuss with them what happened accidentally,” Coffindaffer said.