New Kensington police say a Valley Jr.-Sr. High School math teacher prodded students to fight during a geometry class in October.
Bradley Reiher, 45, of Tarentum, is charged with misdemeanor corruption of minors and endangering the welfare of children.
The charges stem from an alleged incident on Oct. 27, 2025, during which police say Reiher helped provoke an altercation between two juveniles.
Reiher told a student, “Stand up and do something; quit talking, and do it,” and “Let’s go, you standing up or not?,” according to a criminal complaint filed against him.
After that, the student walks past the teacher and repeatedly asks a second student “Do you want to fight?” before throwing the first punch, according to the complaint. A third student later joined the fight, the complaint said.
Reiher and another teacher then broke up the fight, the complaint said.
The incident was apparently captured on video, which the complaint said was posted on social media. A discipline report submitted to school administration, however, reported that the two students argued before engaging in a mutual fight, according to the complaint.
New Kensington-Arnold Superintendent Chris Sefcheck confirmed Reiher still is employed by the district, but he declined to comment on an active investigation.
No defense attorney was listed on Reiher’s court documents.
His preliminary hearing is set for Jan. 22 before District Judge Frank J. Pallone Jr.