There are a lot of questions surrounding why cops didn't take a sample of Tiger Woods' blood after his rollover crash ... but the fact of the matter is, there was simply no reason for them to do so because there was no evidence Tiger was impaired at the time of the crash.
Law enforcement sources tell us there were no drugs or alcohol inside of Tiger's GV80, nor did he show any signs of impairment when he was pulled out of the wreckage. In fact, cops say he was awake and alert on the ambulance ride over to the hospital .