Female Audi driver high on 'hippy crack' laughing gas killed musician as he talked to his father on the phone - after ploughing into him at 53mph in a 20mph zone | Daily Mail Online

Tiffany Treanor-Johnson, 27, was high on the Class C drug nitrous oxide, and speeding at 53mph in a 20mph zone when she hit Harry Webb, 27, and drove off. He died two days later from his injuries.