Not natural causes:
1. Pulmonary embolism
2. Deep vein thrombosis
3. Injury to knee caused by road traffic accident
So they have to hold an inquest because her death was as a direct result of the accident 6 weeks before she died. It's getting all the statements, etc that takes the time - there were 9 witnesses. If it proves that the motorcyclist was at fault he may face criminal charges in connection with her death because it occured less than a year and a day after the accident.
It was on her birthday, she was going out with a group of friends to celebrate, next thing I know I get a phone call telling me she's had an accident and is in hospital. They operated to repair the damage - three ripped tendons and a shattered kneecap. She was in a special plaster that allowed her to flex her knee and only went home 2 weeks before she died.