DNA evidence could soon tell cops your age, whether you smoke, and what you ate for breakfast

That was the case in a murder trial that Bruce McCord, a forensic chemist at Florida International University, served as an expert witness in. A woman was murdered shortly after she went through a divorce, and DNA from her ex-husband was found on her body. But it was hard to tell if the DNA was the result of innocent contact between the two, or if it was incriminating, and came from blood.