The threat that put Westside High School on edge for an entire week last month cost the district $25,000. That doesn't include the cost incurred by Omaha Police.

Student Pat Arkfeld won't forget April 25th, when police were out in full force at the school and 1,200 students stayed home. "I just want to know who did it because they never really caught anyone or put a face with who wrote that on the walls and stuff. I think that would really make a lot of people feel better."

Vehicle windows were shot out the same week the threatening messages were discovered written inside a Westside bathroom.

At Monday night’s school board meeting, administrators say they've invested $25,000 in extra security. "It showed that we have a lot of holes in our current security system, so we should address that."

Additional security cameras are just part of the upgrade. Police and school leaders won't say what else they're doing since the April incidents that led up to prom weekend.

Three teens were arrested for what prosecutors say were "copycat incidents." Police say they're not responsible for the original threat.

Douglas County Attorney Don Kleine says the price of peace of mind isn't cheap. "All the costs that are involved, the security, the police department and disruption to the school activities is a very serious matter and it's going to be treated as such."

"A lot of the people, they feel a lot more secure after that initial period," says Westside student Max Dayton.

"I just hope this doesn't happen again,” says Westside student Vicki Vance. “We've dealt with so much over the years like me and my friends. For this to happen to the entire school is just pointless and silly."

Police and school officials found their closest ally to be other students as classmates helped identify the teens and were very proactive during the investigation.