running a 3-month long sting operation in which he said he was thinking about carrying out an attack similar to the 2009 shootings at fort hood which left 13 people dead. on saturday, jell-o purchased an assault rifle from blue ridge in chantilly which was cooperating with the fbi. the weapon was made inoperable he was arrested sunday. rabs to the shooting of an reaction to the shooting of an ice cream vendor who was ambushed after he went to park his truck on independence day. friends of the vendor are shaken up. reporter: they are badly shaken up, a cash and carry business, the robbers knew where to carry off this ambush, the vendor hit 9 times by gunfire, he is in critical condition this afternoon, nearly 24 hours after shot here. charles heard the gun shots and ran to the injured vendor, surprised to see a familiar face, the cousin of an acquaintance. he said i think i m going to die. i said you are not going to die. reporter: the vendor was hit by 9 gun shots a