After a streak of incidents — a shooting at Perry Hall High School, a gun at Stemmers Run Middle School, and a BB gun at Owings Mills High School — school resource officers at Baltimore County schools will carry metal detecting wands, beginning today.

County Police Chief Jim Johnson told ABC-2 that the wands will be used to “enhance visual observation.” They won’t be scanning students as they enter the building. The wands won’t be used for random searches, either.

The county’s superintendent was initially hesitant to employ metal detectors, referencing school districts that have added the devices withou seeing an end to incidents. But, obviously, his opinion has changed.