Prince William and Prince Harry's 20-year-old cousin Rosie Roche tragically died from a "traumatic head injury" on July 14. Here's everything to know about Rosie Roche, Prince William and Prince Harry's 20-year-old cousin,

Rosie Roch, a cousin to Prince William and Prince Harry, has died at the age of 20, according to multiple outlets.

The cause of death has been revealed for Prince William and Harry’s 20-year-old cousin Rosie Roche, roughly a week after she was found dead with a firearm nearby.