A New Hanover County sheriff's deputy Friday shot and killed an 18-year-old man suspected in an armed robbery of two PlayStation 3 video systems, authorities said.A puddle of blood on the hardwood floor of his living room left a harsh reminder Saturday of what took place, and family and friends expressed outrage.The deputy shot Peyton Strickland about 8:45 p.m. Friday in the Long Leaf Acres house Strickland rented with three other young men, said his roommate, Mike Rhoton, who was home at the time. He said Strickland was unarmed.