Blue Lives Matter™ Thin Blue Line With Flag Sleeve Print Support T-Shirt. 2016 is off to a sad start for law enforcement, 12 Line of Duty Death for Officers and 8 K9 Line of Duty Deaths. Gun Fire Deaths are up 900 percent in 2016. This shirt recognizes that Law Enforcement Lives Do Matter two or four legged. This is a Professional screen printed design on the front with a Thin Blue Line Flag accent on the sleeve for nice detail. All Lives Matter including Law Enforcement Officers!