bogus. >> did you say you heard a shot? >> yes. >> now you're saying this might be days earlier. what's going on here, right? >> correct. that first inference from the 911 call and what chare had said in the driveway to the deputies seemed to be in confrontation with what we were starting to see inside. >> down at the sheriff's office, jean tan, the mother, was released from custody, but not charlie. the 19-year-old ivy leaguer was charged with second degree murder. >> what did you think, anna? >> i was shocked. i was just so confused about, i didn't think it was real. i didn't think it was possible. >> charlie tan, the nice boy, the great kid, if convicted, was facing 25 years to life in prison. coming up, store video shows the gun that killed charlie's father being purchased. but it's not charlie buying it. >> new name all together here.