Bidding in an online auction for the pistol George Zimmerman used to shoot and kill unarmed teen Trayvon Martin in 2012 topped $65 million Friday, though the amount appeared to be inflated by fake buyers with names such as “Racist McShootFace.”Zimmerman was criticized after offering Thursday to sell the Kel-Tec PF9 9mm handgun, which the former neighborhood watch volunteer called in the auction listing “an American Firearm Icon.”Zimmerman said the weapon was used to defend his life and “end the brutal attack” from Martin.