Anna had bruises on her elbow and head. Ankles were swollen. She had no fractures or scratches on her body. Their were no signs of getting strangled on her neck.
Based on our evidence, I have came to a conclusion that Anna died of natural causes. looking at all the evidence, there is no sign of her being murdered. She was taking Aspirin so she might have had a headache or nausea and she fell and hit her head.