Appearances here are of abusive head trauma. There is no history of head injury. Further assessment confirms no coagulopathy or underlying processes that would predispose bleeding.

Abusive head trauma is a collective term that describes impact head trauma, shaking, or impact head trauma and shaking.

There is evidence of impact head trauma (the skull fracture and extra-cranial hematoma). Acute blood in the extra-cranial and subarachnoid space suggests that this has occurred within the preceding 2 weeks. 

The main question, in this case, is whether this could all occur from a single impact head trauma?