Former Broward County Deputy Scot Peterson was arrested Tuesday on seven counts of neglect of a child and three counts of culpable negligence and one count of perjury. He was booked into the Sheriff's Office main jail in Fort Lauderdale.
The arrest follows a 15-month investigation into the actions of law enforcement during and after the mass shooting at Marjory Stoneman Douglas High School in Parkland.
Peterson, 56, the school security guard, was on duty during the attack but never went inside, even after he heard shooter Nikolas Cruz repeatedly firing his weapon.