Not long after, a witness ran up to the doctor’s car as he was parking in his garage around 2 p.m. — a time that on any other day, he said, he would not have been home. But on Tuesday, he had to let a construction crew into his home to begin work on a bathroom remodel. He still had his stethoscope around his neck as he followed the other man over to where Zheng lay on the ground, his gray hooded sweatshirt and the T-shirt underneath soaked in blood.
