The most serious charges were dropped through a plea deal against a former Corry student originally charged with threatening to shoot up a school.
Investigators say 20-year old Scott Perkins said he could become a school shooter and allegedly threatened to attack Corry High School.
A student at the school notified a teacher about the threats through a Facebook message in March.
Officers say Perkins also warned his friends not to go to school the following Monday.
Tuesday Perkins pleaded guilty to a reduced charge of disorderly conduct.
Prosecutors say several people wrote letters on the defendant’s behalf, including the school principal, teachers and classmates.
The judge sentenced him to 90 days of probation.