A series of allegedly linked shootings early Thursday morning in LaPlace, La., left two law-enforcement officers dead and two others wounded. The first shooting took place in a parking lot at a steel plant, and the second occurred at a nearby trailer park. While at the trailer park investigating the first shooting, officers were ambushed by a man reportedly armed with an assault rifle. Five people were taken into custody, some of whom had been wounded. Investigators say there are no suspects still at large.