Springfield police will be keeping a closer eye on faces in the crowd.
Aldermen have approved the purchase of a $37,000 surveillance trailer from the Department of Homeland Security.
SPD plans to use the trailer at major festivals and events like the city basketball tournament.
Police Chief Robert Williams says the trailer will serve as a crime deterrent... and will also aid prosecutors if there are incidents at big events.
Williams says the video from the trailer will only be reviewed by Springfield police... not the Department of Homeland Security.