Angela Chao, the billionaire sister-in-law of Senate Minority Leader Mitch McConnell, was drunk when she accidentally reversed her Tesla into a pond on a Texas ranch and died last month, according to police.

The revelation was detailed in a report released Wednesday by the Blanco County Sheriff’s Office, which said Chao’s blood alcohol level was nearly three times the state’s legal limit when she backed her car into the pond while making a three-point turn.