"The star prosecution witness in the double murder trial of Aaron Hernandez returns to the stand Wednesday for a third day of testimony in Suffolk Superior Court. The witness, Alexander Bradley, has provided critical testimony in the case against Hernandez, a former New England Patriots star. Hernandez, 27, has pleaded not guilty. In particular, Bradley is the only eyewitness to identify Hernandez as the person who fatally shot Daniel de Abreu and Safiro Furtado in the early morning hours of July 16, 2012 in Boston’s South End. But one glaring inconsistency has to do with the murder weapon. Prosecutors say Hernandez fired five shots from a 104-year-old revolver that was recovered in June 2013 from the vehicle of a woman with ties to Hernandez. But Bradley testified Monday that Hernandez wiped the murder weapon down and tossed it from the window of a Toyota 4Runner as they fled the crime scene. “I was the one who purchased the gun,” Bradley said Tuesday, referring to a shiny .357 revolver he bought for Hernandez about a month before the killings, with $350 the athlete gave him. “You still say that’s not the gun,” defense lawyer Jose Baez said Monday, referring to the .38 caliber revolver authorities have identified as the murder weapon. “Correct, I didn’t believe that was the gun,” Bradley replied. Boston police say the .38 caliber revolver, manufactured in 1913, appears to be the murder weapon based on a match with ballistics evidence at the crime scene. "