PAWNEE COUNTY, Okla. — Multiple men are arrested after a child sex sting in Pawnee County.

The Pawnee County Sheriff says the investigation started when a middle school student accused an older classmate of making a lewd proposal.

That case led investigators to look into social media app, which lead them to the men who the sheriff says were targeting underage boys for sex.

In total, 11 men were arrested as a result of the investigation.

Sheriff Mike Waters said the suspects were caught through an app called Grindr.

Three of the men live in Pawnee.

The others are from Pawhuska, Ponca City, Stillwater, Ripley, Oilton, Glencoe and Vinita.

The sheriff believes all of the men knew the boys were underage when they engaged in illicit conversations through the app.

Two of the men, 25-year-old Thomas Muench and 25-year-old Quinton Griesel, are charged with rape.

An affidavit shows Griesel had sex with a 16-year-old boy in a bathroom stall at Pawnee High School.

Records show Griesel worked for a food service vendor at the time and served lunch at the school.

Pawnee and Osage County District Attorney, Mike Fisher says law enforcement and schools can only do so much to protect children.

He said parents need to keep better tabs on their kids.

The other men are facing charges ranging from lewd acts with a minor, to soliciting a minor for sex and child porn.

The district attorney said someone caught with one image of child porn faces up to 20 years in prison.

He said someone with more than 100 child porn images can go to prison for life.

The men arrested and charged in the sting are:

• Cody Cramer, 34, charged with forcible sodomy.
• Charles Boggs, 55, charged with soliciting sexual conduct with a minor through technology and showing obscene material to a minor.
• Gabriel Primeaux, 28, charged with soliciting sexual conduct with a minor through technology, showing obscene material to a minor and soliciting a minor for indecent exposure or obscene material.
• Jacob Simmons, 20, charged with soliciting sexual conduct with a minor through technology, showing obscene material to a minor and possession of child pornography.
• Johnathan Tackett, 33, charged with soliciting sexual conduct with a minor through technology, showing obscene material to a minor and possession of child pornography.
• Keith Ray, 29, charged with soliciting sexual conduct with a minor through technology and showing obscene material to a minor.
• Michael Wilson, 45,  charged with soliciting sexual conduct with a minor through technology and showing obscene material to a minor.
• Zachary Sabus, 37, charged with soliciting sexual conduct with a minor through technology, showing obscene material to a minor, possession of child pornography and peeping tom.
• Quinton Griesel, 25, charged with second degree rape, forcible sodomy and lewd or indecent acts with a child.
• Thomas Muench, 25,   charged with second degree rape, soliciting sexual conduct with a minor through technology and possession of child pornography.
• Marty McDougall-Casteel, 40 booked into the Pawnee County jail and facing charges of soliciting sexual conduct with a minor through technology, soliciting a minor for indecent exposure or obscene material and showing obscene material to a minor.