Reporter he captured video moments after police say a man was stabbed. We just saw a guy laying on the ground. Reporter he and his friends looked out from the barnes noble parking lot. We heard him screaming. Witnesses say it appears he was stabbed in his upper body. Someone said he was walking the street with blood all over him so he went to the grass and people were warming him up. And then the first couple police cars showed up. Reporter the teenagers say other drivers stopped and helped him before the ambulance arrived. Crime scene investigators marked up close. Detectives searched for clues. Witnesses say a woman and a golden retriever were also in the honda. When Police Arrived they took another car away from the scene. The suspect vehicle was already gone. Reporter police say the victim is a 30yearold man from randolph. Hes in the hospital and police have yet to make an arrest in this case. Reporting live in braintree, cbs news. An explosion in North Andover rocking the dow Chem