A 21-year-old woman who called in a gun threat at Lincoln High School in Wisconsin Rapids Tuesday morning has been identified as Autumn Trepish.

Police said she was attempting to divert police away from a shoplifting complaint at Walmart. The Wisconsin Rapids Police Department was in the process of investigating the complaint when the call came in. Two suspects were detained by the store's loss prevention team while two more suspects, including Trepish, were waiting in the parking lot.

Police said Trepish called 911 and reported that a man armed with a gun was walking around Lincoln High School.

Officers treated the response as an active shooter situation and the school went on lockdown. A sweep of the school was immediately conducted and nothing was found.

Lt. Joel Flewellen said the allegations against Trepish are serious.

“We had approximately 15-20 officers arrive and it makes it unsafe for the public a lot of times. It was icy yesterday and the response--- we have to get there in a quick way, so we’re going lights and siren," he explained.

School was already cancelled due to inclement weather. There were no students inside the building, but some staff was present. The lockdown was lifted and staff were able to return to their duties around 9:40 a.m.

Superintendent Craig Broeren says anytime there is a school threat it's concerning.

“It certainly did heighten fears, but it’s been on my mind on other school superintendents minds and school employees for the last several years as a result of the trends we’re seeing in society," Broeren said.

Trepish remains in the Wood County Jail on $10,000 cash bond.

At no time was the suspect ever at or near Lincoln High School and none of the shoplifting suspects attend any school in Wisconsin Rapids.

Lincoln High School Principal Ronald Rasmussen sent a letter to parents informing them that security will be increased when students return to class on Wednesday. Extra uniformed officers are assigned to patrol school grounds.

Rasmussen said it is clear that Tuesday's threat was not credible, but the school district and police do not take the incident lightly.