CUYAHOGA FALLS — Police found weapons at a Monroe Avenue teenager’s home Wednesday following a trespassing incident at Cuyahoga Falls High School two days earlier and believe a threat of violence he allegedly made against the school is credible, Police Lt. Gary Merton said Thursday.

Merton declined to identify the weapons.

According to Stow Municipal Court records, 18-year-old Allen M. Kenna entered a felony no plea to third-degree felony making terroristic threat and pleaded not guilty to fourth-degree misdemeanor criminal trespassing at his arraignment Thursday.

Police responded to the school after hours Monday when a school custodian reported seeing Kenna walking around the building.

In an all-call to district parents Wednesday afternoon, Cuyahoga Falls City School District Superintendent Dr. Todd Nichols said his staff "immediately" called police following the incident Monday.

"Monday evening, a suspicious individual was identified in the halls of CFHS who appeared to be taking pictures using a cell phone," said Nichols. "When addressed by CFHS staff, the individual fled the premises."

The district’s surveillance equipment was used to capture photos of the man and it was determined he was not a student at the school, Nichols said in the call.

Nichols said Thursday that Kenna was home-schooled and never attended CFHS, but was known by some of the people at the school "as a member of the community."

The photos and identification was shared with police Wednesday morning, said Nichols. He said the school did not receive any threats directly, but alleged threats Kenna made on social media were found during the subsequent police investigation.

A Cuyahoga Falls Police Department press release issued Thursday said Kenna allegedly "made threats to commit a shooting at the school."

A complaint police filed with the court alleges the threats were made to "others" prior to the trespassing incident.

Following the execution of a search warrant at Kenna’s home, he was arrested and taken to Summit County Jail, where he was being held on a $250,000 bond on Thursday.

Kenna is scheduled for a felony status hearing and a pretrial on the misdemeanor offense before Judge Kim R. Hoover on Jan. 14 at 10:30 a.m. An attorney for Kenna could not immediately be identified.

Nichols told district families that the incident is a reminder to follow the mantra, "if you see something, say something."

"By doing so, we can help the entire community stay as safe as possible," added Nichols.

Reporter Phil Keren can be reached at 330-541-9421, pkeren@recordpub.com, or on Twitter at @keren_phil.