Monique Rivarde said she wants justice for her son who was beaten to death at a house party in Douglas County.

“My son did not die in vain,” said Monique Revaida, the mother of 18-year-old Bobby Maurice Tillman. “Something will be done about these children attacking each other for nothing.”

Police say the party started out small but grew out of control when 50-80 young people showed up after word spread by e-mails and text messages.

According to online reports, when the parents saw the large gathering outside their home, they asked the uninvited guests to leave.

That’s when a fight broke out between two females and two men. One of the females hit a man, said Douglas County Maj. Tommy Wheeler. He said the suspect told him he couldn’t hit a girl, but he would punch the first man who walked by.

It was Tillman’s fate to walk by at that moment. He was pounced upon by a small crowd who punched, stomped and kicked him as he lay on the ground.

“It’s amazing,” said Wheeler. “He had nothing to do with anything, they just decided he’s the one. And they killed him.”

Tillman was still alive when paramedics arrived, but he died before he could be transported to the hospital.

Four men were quickly arrested. They are Quantez Devonta Mallory, Horace Damon Coleman, Emanuel Benjamin Boykins and Tracen Lamar Franklin. They are age 18 to 19. They are being held in Douglas County jail without bond.

“They haven’t even allowed me to call him,” said Erica Hillery, Mallory’s mother. “I feel real bad for the victim’s parents but I need to know what’s going on.”

Douglas County Sheriff Phil Miller is catching heat for rounding up 57 kids from the party and transporting them by bus them to the sheriff’s office for interviews.

“I had six people to interview 57 people,” Miller told the AJC on Monday. “I didn’t violate anybody’s rights. We loaded them onto a bus, there was heat on the bus, they were allowed bathroom breaks and we interviewed 57 people between 2:30 a.m. and 8:30 a.m. Sunday. Our goal was to find out who murdered this young man.”

“I apologize if I offended anyone, but I’m not required by law to notify parents,” the sheriff told the AJC. “If the parents were so interested, why were those kids out after midnight?”

Sources: CNN, AJC, Boston