Oklahoma teen Noah Presgrove found dead on highway 'next to his teeth' was so badly beaten that mourners at his open-casket funeral were shocked by his injuries

The teenager found dead on the side of a highway with his teeth knocked from his mouth was so badly beaten that mourners at his funeral said it looked like he'd been attacked by a gang of five. 

Noah Presgrove, 19, was wearing only his shoes when his body was discovered on a desolate stretch of US-81 near Terral, Oklahoma, on September 4. 

He was last seen alive about a mile away at a four-day 22nd birthday party with friends over the Labor Day weekend that was heavily documented on social media. 

A friend who wasn't at the party questioned one of the teenagers in the weeks that followed about what happened to cause his facial injuries.

Noah Presgrove, 19, was wearing only his shoes when his body was discovered on a desolate stretch of US-81 in Terral, Oklahoma , on September 4

A friend who wasn't at the party questioned one of the teenagers in the weeks that followed about what happened to cause his facial injuries

'Bro, everyone that saw Noah at the viewing, including me, saw his face was beat up bad,' he said in a message shared with DailyMail.com.

'I know what a beat up face looks like. Definitely not just me saying that. Everyone that saw him said that.

'Looks like he got beat up by 5 dudes.'

Other people who saw his body said it looked like his nose and cheek were broken. 

The damage to his face was in addition to other injuries to the back of his head and upper body Presgrove suffered, and added fuel to fears he was murdered.

Oklahoma Highway Patrol detectives, who are leading the investigation, are still unsure how he died, and were told conflicting stories about that night.

Theories include him being 'forcibly pushed from the bed of a moving truck' where the blood spot was, and staggering along the road before collapsing.

Oklahoma Highway Patrol detectives, who are leading the investigation, are still unsure how Presgrove died, and were told conflicting stories about that night

He was last seen alive at the four-day 22nd birthday party with friends over the Labor Day weekend that was heavily documented on social media

Presgrove could also have been killed in an accident or murdered elsewhere and his body dumped on the highway.

Initial belief that he was killed in a hit-and-run was ruled out based on the pattern of his injuries that didn't include any damage to his lower body.

Presgrove suffered massive blunt force trauma to the back of his head, causing skull fractures but not killing him, according to correspondence with investigators shared with DailyMail.com.

Instead, he died of internal bleeding in his torso, where he had several broken ribs and deep bruising on his left side.

The teenager's body also had what looked like road rash on his left shoulder and hip, and his fingers were torn up like he was desperately clinging to something.

Presgrove's body was found about a mile north along the highway from the small street where the party was held

Confronting photos of police chalk outlines showed where his body, marked by the white line, and at least one of his teeth, marked by the circle, were found

Confronting photos of police chalk outlines showed his teeth were found scattered across the highway, some a dozen feet from his body.

Farther away still is a spot of blood - the only blood found at the scene despite the extensive injuries all over his upper body.

Presgrove and his friends graduated from Comanche High School just a few months earlier and his family said he planned to join the military.

But that weekend they were drunkenly celebrating the end of summer with a raging party at the birthday girl's home, on a small street about a mile south from where his body was found, detailed in videos obtained by DailyMail.com. 

One video from the night he died showed some of Presgrove's friends writing their names on his bare buttocks with marker. 

Presgrove's body was found between the two chalk lines, and teeth within the circles. In the background is a memorial set up for the teenager

Farther away still is a spot of blood - the only blood found at the scene despite the extensive injuries all over his upper body

The blood spot was dozens of feet away from the body, which is opposite the cross

The writing was not still there when his body was discovered in the early hours of the morning but it was not known how and when it was removed.

Other photos show the teenager writing on the buttocks of another friend, and posing alongside them with a signature on his chest.

Two more videos show Presgrove daring friends to slap him across the face as they partied under an outside patio at the house.

Presgrove had to repeatedly insist that a male friend hit him, eventually only giving him a light tap before sprinting away in fear of retaliation.

Another concerning photo appeared to show a teenager holding a rifle with Presgrove visible in the foreground.

That weekend they were drunkenly celebrating the end of summer with a ranging party at the birthday girl's home

Another concerning photo appears to show a teenager holding a rifle with Presgrove visible in the foreground

Presgrove (left) poses with a friend on the Sunday night of the party hours before his death

Presgrove's family complained his friends all claimed to have no idea what happened to him and how he ended up dead by the roadside just hours later.

The Oklahoma State Bureau of Investigation described his death as 'suspicious' days later, but few details have been released about the investigation.

Even Presgrove's family said they were in the dark and the Oklahoma Highway Patrol refused to provide any details to maintain the 'integrity of the investigation'.

'The longer you keep the truth inside, the guiltier you become… you could aid in getting justice for Noah,' his sister Madison Rawlings said.

'You could do the right thing and may receive a mercy that was not given to him, but the longer we sit in silence, the worse it becomes for you.

Presgrove's (left) family complained his friends all claimed to have no idea what happened to him and how he ended up dead by the roadside just hours later

One video from the night he died showed some of Presgrove's friends writing their names on his bare buttocks with marker

'The longer you keep the truth inside, the guiltier you become… you could aid in getting justice for Noah,' his sister Madison Rawlings (pictured together) said

'I hope those involved see that we are not budging and the silence fuels our desire to know more. 

'I miss Noah daily. This is the hardest chapter of my life, but I am thankful that I have a family that will not give up on each other.'

Presgrove's grandmother Deborah Smith also called on his friends to tell the whole story about what happened the night he died.

'When you think you have friends that you trust with all your heart and then here it comes. Sorry Noah that some of your true friends stabbed you in the back,' she said.

'A piece of my heart is missing and every day that goes by and Noah doesn't walk through the door and still no answer just takes another piece of my heart.'

Presgrove's aunt Robyn Smith (center) and grandmother Deborah Smith (right) appealed for answers more than seven months after his death

His family said all they were told is that he suffered head trauma, but were not sure if that was his cause of death

Presgrove and his friends graduated from Comanche High School just a few months earlier and his family said he planned to join the military

Presgrove was a high school football player until his graduation in May

His aunt Robyn Smith begged anyone with information to at least tell the police so his family would have answers seven months later.

'We lost an amazing young man to the horrible choices of others, please do not let us lose out on justice,' she said.

'We’ve heard so many different stories, but we have yet to hear the truth. The whole truth. Which we deserve. 

'I know it’s scary and I know it’s hard, but we deserve to know what happened. Noah deserves to have his story told. We will not stop searching and asking. We will not stop demanding. It will come out.'