Aussie Twins Shot in Head at Colo. Firing Range Investigators trying to determine which sister died By Mary Papenfuss, Newser User Posted Nov 17, 2010 2:17 AM CST 11 comments Comments No suicide note was found at the scene. (?Marcin Wichary) (Newser) – Australian twins have been shot in the head in a mysterious Colorado firing range shooting. One was killed and the other seriously injured. The 29-year-old women are in the country on cultural exchange visas. Investigators are trying to determine which twin died; her sister isn't yet able to talk. Detectives aren't sure who fired the gun or guns, or whether the same bullet hit both sisters. The twins, who had taken a taxi to the range, had been there for more than an hour when they were shot. No suicide note was found, AP reports.