Officers were able to tackle headley hes ran away. So the injured officer is expected to survive and headly face as young on monday. Coming up here on wbz news at 6a. Trauma surgeon talks about the tool that may have saved the david. Investigators are still inside the North Andover dow chemical facility trying to figure out exactly what sparked the explosion that critically injured several workers. Hazmat teams spent most of the day at dow chemical trying to make sure the scene was safe. Ken macleod is live. Reporter a mangled container with the explosive chemicals still in it was carted away by the bomb squad about 90 minutes ago. And finally investigators were able to get a closeup look at the blast site. Hazmat and even bomb specialists went in this blast site and make sure no other explosions were imminent. The investigation cant start until they make the area safe. Reporter he is talking about the lab at dow chemical where 4 employees were working around a basketball size containe