A 16-year-old student took his own life Wednesday afternoon, just an hour after he approached classmates armed with a gun on campus at North Mecklenburg High School in Huntersville. The events put four schools temporarily on lockdown and had the area police and campus officers on high alert. Just after the lockdown ended, officers tracked the student to a gas station. When police approached the teenager, he made his weapon visible, but instead of putting it down, he turned it on himself.