A 16-year-old Concord High School student is now in jail facing harassment and criminal gang recruitment charges.
Police arrested Markell Rugg Thursday afternoon.
The investigation started when a threatening note was found in a boy's bathroom.
Concord's Superintendent Wayne Stubb would not comment on Rugg's arrest, but said the district's student handbook has a strict policy against any gang involvement and prohibits all gang-related behavior.
The handbook states the corporation will vigorously discipline any student who conducts gang-related activities on any school property or at any school function or activity.
"I'm honestly very surprised that something like that would happen here at Concord," said Kaitlyn Radford, a senior at Concord.
WSBT asked Radford if she was aware of any gangs at school.
"It's not something that's prominent. If it [gang activity] is here, it goes on unnoticed," Radford stressed.
Elkhart County Police say this is the third school related threat they've investigated this week. On Monday, a threatening letter was found in a bathroom at Concord. The letter stated there would be a school shooting on Tuesday. In response, police added extra security and searched the school building, lockers, students and staff.
The same day a threatening note was given to Jimtown Junior High School officials. That note reported that a bomb was going to go off at the school on Wednesday. After investigating, a 14-year-old student was suspended for writing the note.
Then Thursday another threatening note was found in a boy's bathroom at Concord. Police have not released what that note said. But investigators say Rugg confessed and was arrested Rugg. Although Rugg is a minor, because he faces gang charges, Indiana law mandates he be waved to adult court.
Police believe all of these threats are not related. They attribute the incidents to students wanting to try to get out of school early to start spring break.
Police are reminding anyone who makes a false report about a bomb threat can be charged with a felony, which is punishable up to three years in prison.