Cobra SIS, A1 (Armor Carrier Only)"The Los Angeles Police Department (LAPD) has a secret weapon in its war on crime. The departments Special Investigation Section (S. I. S.) is an elite tactical detective squad with a straightforward mandate: Track down the Citys most dangerous offenders and take them off the street. S. I. S. are possibly the hardest working, most dedicated men and women Detectives to wear a badge." The Cobra SIS vest was designed with input by detectives from the