The UMass Police Department wrapped up its latest round of active shooter training on Sunday.
The department has been conducting the training sessions each year since the Virginia Tech shootings in 2007.
Over the past several weeks, every member of the department has gone through the training at Dickinson Hall on campus.
Dickinson Hall was chosen because it features long hallways, many classrooms and multiple floors.
UMass police Deputy Chief Ian Cyr told CBS 3 that active shooter training really changed after the Columbine High School shootings in 1999.
"Prior to 1999, immediate officers would arrive, they'd set up a perimeter and wait for the SWAT Team to arrive," said Cyr. "Columbine changed that. It forced our officers to really go into the building immediately."
CBS 3 cameras tried to get inside to watch some of the action, but we were told the trainers would not want the tactics recorded.
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