What happened in a Rockville, Maryland, high school this January was a scene all too familiar for police officers across the US. An altercation between two boys ended with a shot ringing out, and a 15-year-old left bleeding on a bathroom floor.
What witnesses to the crime did next, however, shocked even Betsy Brantner Smith, a nearly three-decade law enforcement veteran and spokesperson for the National Police Association.
"The students started tweeting about it," she said. "That's just, unfortunately, the era we live in."