Zarin Thomas, 15, American, (from the west or desert most likely judging by her tanned skin and sun-bleached hair) was on a school trip to Buckingham Palace and was found in an deserted courtyard dead with tally marks covering her arms, legs, lower neck, upper chest, and back. No signs of struggle or violence. It just appears she dropped dead. The autopsy shows her heart simply stopped for reasons not yet known. Time of death was approximately 13:27.
Sherlock sighed and folded up the paper with the poor girls death report on it, This was going to be an interesting case.