In 2008, crime scene investigators discover the bones of a person who appeared to have been the victim of a brutal attack that occurred a long time ago. They would like to know the year when the person was murdered. Using carbon dating, they determine that the rate of change of the 146C is 0.268 Bq per gram of carbon. The rate of change of 146C in the bones of a person who had just died is 0.270 Bq per gram of carbon. What year was the victim killed? The half-life of 146C is 5.73 ∙ 103 yr.