Trial of Scot Peterson, former Parkland school resource officer, continues with emotional testimony and defense arguments.

The homicide detective who led the investigation into the 2018 Parkland high school massacre wept on the witness stand, saying the school's assigned deputy, Scot Peterson, could have prevented the deaths of some of the 17 people murdered if he had charged into a building instead of taking cover. Peterson is charged with felony child neglect for failing to protect the juvenile students killed and seriously wounded after he arrived at the building, about two minutes into the massacre. If convicted, he could be sentenced to nearly 100 years in prison and lose his $104,000 annual pension.