>> reporter: the officer, michael leonard, with the coconut creek florida police department arrive on scene shortly after the shootings, but after the police converged on the scene and basically had taken over the scene. other police officers were there already saying it was heavy with police presence at the school, so he decided on his own to venture into the neighborhood and got into an area kind of a back neighborhood area with residential streets and saw the suspect walking there and apprehended there. >> dramatic story indeed. we'll get back to you. you are working sources there as well. i want to go to the justice correspondent, evan perez, working sources, talking to federal officials among others. as of right now, there's a greater emphasis on mental health problems than on guns. update us on that. >> reporter: that's right, wolf, one of the problems here is that at least from the indications we got in the investigation, early in the investigation, is that there were plenty of signs and something wrong going wrong with this young man, and it somehow