On July 4 last year, Detroit paramedic and Emergency Medical Services assistant supervisor Al Saade was in the office when he received an urgent call to attend a multi-vehicle crash.He arrived at a chaotic scene. Three of the people involved in the crash had injuries. Saade's EMS supervisor, Captain Robert Calandro, also just arrived, assigned him to do patient triage.There was also a Fire Department Battalion Chief at the scene. Saade said the …