A teenager was drunkenly having his bottom painted and daring friends to slap him at a raging party hours before he was found dead by the side of the road.

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

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 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 ranging party at the birthday girl's home, detailed in videos obtained by DailyMail.com.

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

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

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.

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

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'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 almost no 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'.

They haven't even seen the medical report or been told his cause of death, and claimed not to have heard from police since last year.

The scant documents available showed cops were told conflicting stories, and initially believed Presgrove could have been killed in a hit-and-run.

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

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

Instead it was possible he 'could have been forcibly pushed from the bed of a moving truck' based on blood evidence.

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

Some of them are convinced he was murdered and his body dumped by the road, still in view of the house where his friends were partying.

'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.

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

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

'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 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.'