Massachusetts State Police Trooper Todd Girouard, holds a tire as he testifies during the murder trial of former New England Patriots football player Aaron Hernandez in Fall River, Massachusetts, March 5, 2015. A tread mark found near the body of a man allegedly killed by Hernandez was made by the tire from a car rented by the ex-NFL star, according to Girouard. REUTERS/Steven Senne/Pool (UNITED STATES - Tags: CRIME LAW SPORT FOOTBALL)