the crime scene. >> reporter: not left at the crime scene? the murder weapon. elkins sister and his mother ditched the gun in this marsh. tests will determine if a gun pulled from the marsh was the gun used to kill little antonio. >> i had to watch my baby die, and i want him to die. a life for a life. >> reporter: that's west's wish shared with piers morgan. under georgia law, not possible. elkins and lane under 18. if convicted, these boys could spend the rest of their life in prison. i understand we now have the photograph of sabrina elkins to put up on the screen this iss elkins sister, charged of working with the mother to get rid of the murder weapon. one other thing, demarquise was charged with attempted armed