Shalom Mathews, a 19-year-old student at Rochester's St. John Fisher University, was arrested Friday on two counts of stalking — just two days after holding a school staff member at knifepoint.

What happened at St. John Fisher University? Monroe County sheriff's deputies were called to the university campus around 5:35 p.m. Wednesday after it was reported that a student had a knife.

A perimeter was established while deputies, along with K9 units, New York State Police, and St. John Fisher University Security, searched the campus and buildings.