Great Valley High School and Middle School went into lockdown Thursday morning as drug-sniffing police dogs roamed the hallways, checking lockers.
According to Dan Goffredo, Assistant Superintendent for Secondary Education and Pupil Services, the search was scheduled in advance and the dogs did not find anything illicit.
"We've used state police for the last few years to come in and do inspections in the high school and middle school. They did both buildings today," said Goffredo, who was the high school principal until this school year.
Keep up on breaking news by liking Malvern Patch on Facebook.
The searches take roughly 20 to 30 minutes per building, as multiple German shepherds search lockers and athletic locker rooms. During that time, students and teachers stay in rooms and out of the hallways.
Goffredo would not disclose the specific details of the searches, but he did say that the dogs are trained to recognize multiple substances and the searches occur more than once per year.