CHEROKEE COUNTY, Oklahoma - An Owasso mother is determined to find her missing son in Cherokee County. National Guard veteran Roger Quinn hasn't been seen or heard from in two weeks.

Quinn's family lives in Owasso and his mom, Darlene Allensworth, has been passing out flyers nearly two hours away, hoping to find her son.

"This is our worst nightmare," she said. "He came back from Afghanistan not the same person."

Deep in the woods of northern Cherokee County, hunters found Quinn’s backpack earlier this week, with clothing and his cell phone inside.

Investigators with the sheriff's office searched the area but, so far, haven't found anything else.

"This is very, very, rural, isolated area. There's no businesses, there's very few homes around," said Undersheriff Jason Chennault.

Quinn's family said he has PTSD and has wandered away before, but this time he's without his belongings.

Allensworth has been passing out flyers in Tahlequah, where he told her he would be visiting a friend.

"The community of Tahlequah was just amazing. They made me actually feel like we're gonna find him and he's gonna be good," she said.

She said aside from serving his country, Quinn is always looking for ways to serve those around him.

"He was gonna let his hair grow so he could donate it, last thing I heard him say,” Allensworth said. “That's just the kind of person he is. He just wants to give anything that he can."

The 28-year-old is 5-feet-7-inches tall and about 160 pounds. He has several tattoos, including one on his arm that says "Family."

The sheriff's office plans to expand its search area early next week if Quinn doesn't show up.

If you see him or know where he is, call the Cherokee County Sheriff's Office at 918-456-2583.