Continuing on from the lacerations and fractures. Both injuries are known to cause haemmorage.
Jason had - subdural hemmorrhage
A subdural hematoma is most often the result of a severe head injury. This type of subdural hematoma is among the deadliest of all head injuries. The bleeding fills the brain area very rapidly, compressing brain tissue. This often results in brain injury and may lead to death.
https://medlineplus.gov/ency/article/000713.htm
Jason had - Epidural Hemmorrhage
Epidural bleeding is rapid because it is usually from arteries, which are high pressure. Epidural bleeds from arteries can grow until they reach their peak size at six to eight hours post injury, spilling from 25 to 75 cubic centimeters of blood into the*intracranial space.[6]*As the hematoma expands, it strips the dura from the inside of the skull, causing an intense headache. Epidural bleeds can become large and raise*intracranial pressure, causing the brain to shift, lose blood supply, or be crushed against the skull. Larger hematomas cause more damage. Epidural bleeds can quickly expand and compress the brain stem, causing*unconsciousness,*abnormal posturing, and abnormal*pupil*responses to light.[7]
https://en.m.wikipedia.org/wiki/Epidural_hematoma
Jason had - subachrnoid Hemmorrhage
You may also have:
neck pain
numbness throughout your body
shoulder pain
seizures
confusion
irritability
sensitivity to light
decreased vision
double vision
nausea
vomiting
rapid loss of alertness
The symptoms of SAH come on suddenly, and you may lose consciousness quickly. Seek emergency medical attention right away if you experience any of these symptoms combined with a severe headache.
*NOTE the symptoms of all all three bleeds Jason had on his brain at time of Autopsy above. His injuries were acute causing scute Hemmorrhage . The symptoms of which can be felt rapidly by the victim. In Jason's situation and the extent of injury it is fair to hold the opinion his symptoms, followed by unconsciousness followed by death was rapid and therefore would also not reflect a man that was flailing around aggressively hitting out attacking, how could he if he was dazed, confused, slurred speech, numb, decreased vision etc.
Another example of why self defence does not fit. It once again is in favour of overkill.
The most common cause of death from trauma at the scene is acute hemorrhagic shock
All only my opinions.
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