Hi. My friends son passed away a month ago. He started his afternoon with a friend drinking. Came home after 2 am and was out of control saying stupid things and wanted to hurt his dad. His mom was in bed and came downstairs to control him by trying to restrain him and talk to him. But he was only focused on his dad. His eyes or pupils get really big and black than he had super strength and launged to his dad. His dad put him in a head lock to hold him meaning not tight. And his was breathing and talking at one point then his dad thought he passed out but he was breathing. Police and ambulance took along time to respond. When paramedics got there they had to call in another team hour later sent him to hospital hours later flew him to another hospital were he was declared brain dead. The boys mother doesn't understand how he could have gotten to this point. Autopsy so far found alcohol and marajuana. His brain is still being investigated. Can u help to break this down on a medical perspective on what happened to his body thanks