No shots were fired and no one was hurt, but parents and teachers have tough questions for the district tonight.
The male student was removed from his class by Southfield police after they discovered he had a gun in a bag. The student was taken into custody without incident.
"We don't know what the person would have done," said Erin Bradley, a student. "I was scared."
School administrators say they learned the student had a gun but don't specify how they learned. Students saw several others removed from school by police.
But teachers believe some were taken for unrelated matters, and that just one student had a gun.
Jaclyn Roberts, public relations for Southfield Schools, said the weapon was not loaded. And the school is ramping up up security with more police and private security as well.
More spontaneous locker searches will be held as well, as a result.
Roberts said the incident happened so quickly as the gun was found and confiscated, that there was not a need for a lockdown.
"There were just a lot of students talking about it," Bradley said. "Then as you walked past the front hallway you could see like five police cars outside and you saw children walking out in handcuffs.
"It was quick, in and out. Once the incident (happened) the police were here, fast."
Southfield police have a liaison officer on duty at the high school, who found the gun in the bag then requested assistance.
"They said that a teacher found out so the security guards came and got him, took his book bag and that's when they arrested him," said student Saiyanna Legrand.
School administration informed parents by a written notice and email indicating the school has a zero tolerance policy for weapons in school. The punishment is the offending student is expelled.
After school practice for Southfield Lathrup's track and field team, Coach Calvin Johnson said while the day was unusual, his athletes seemed to take it in stride.
"I was very pleased with how the students said in how the administration responded," Johnson said.
Teachers have said that recently there have been more altercations, foul language and students roaming the halls.