WESTMINSTER, Colo. – For nearly 50 years, there was a question no one could answer: Who killed Teree Becker?. “She was a very free spirit, that’s what her family talked about a lot. She kind of lived life on the edge,” said Chandra Thurston, senior criminalist with the Westminster Police Department who has been lead detective on the case for years. “There were definitely times during this where you felt, ‘I am never going to figure this out. … We are never going to figure this out.'”