READ MORE: Elvis' daughter Lisa Marie blasts Graceland's 'damn back lawn' and what it hidesThere were rumours that Priscilla's father, angry after so many years living with his daughter, threatened to prosecute Elvis for taking a minor across state lines. He had been travelling with Priscilla to Los Angeles and Las Vegas when she was 15, which was contrary to the agreement made with her parents when they permitted her to leave Germany aged 16 to move to the US.