MUSTANG, Oklahoma - Mustang police confirm they arrested three students for drug-related charges, but Wednesday night, one mom says she's upset with how the school handled the situation.

This mom says her son was one of 10 students suspended, suspected of doing and dealing drugs. But she says the school went too far and she plans to fight.

"I was shocked," said mother, Cassie Lindsey.

Lindsey says she's already visited with an attorney about her son's suspension.

"Principal…Foreman informed me that some kids had gotten in trouble for some drugs and my son was constantly saying ‘It wasn't me. It wasn't me,'" said Lindsey.

She even made her son take a drug test, which she says came back clean.

"Everything is negative," Lindsey said.

She even showed News 9 the results as proof.

Mustang School officials did not talk to News 9 about the arrests or the suspensions. But they did release a statement about the incident. In it is says the district "became aware of allegations that several students were possibly in possession of illegal substances. And that both they and police were "launching investigations".

"I don't think the children that were caught with nothing on them should be suspended. In fact, there is one child who was tested, who was not suspended who is still going to school," Lindsey said.

This mom says the school did not follow school policy and should have notified parents and students about the suspensions and the investigation.

"They've suspended kids without proof. They searched kids without parental consent and I think the kids' rights have been violated. I think parents are upset because their children were violated," said Lindsey.

Lindsey says she plans to go up to the school Thursday morning with her son to see if the suspension will be lifted or if they will finally give her written proof of why her son was kicked out.

Mustang police also declined News 9's request for an on-camera interview. They would only say a 14, 15, and 17-year-old student were arrested. And that a substance suspected to be synthetic marijuana was seized and will be sent to the OSBI for analysis.