[Warning: Potentially Triggering Content] A 20-year-old cousin of both Prince William and Prince Harry has been found dead. According to multiple media reports, Rosie Roche - the granddaughter of Princess Diana's uncle - died at her family home in the Malmesbury area of Wiltshire, UK last Monday. According to The Sun, she had apparently been packing up for a trip with friends when she died. That outlet reports the young woman was found by her mother and sister.