It's really sad to hear that Lisa Marie has left us and of course very sad for her mother Priscilla. I saw her father Elvis live a couple of times at the early 70s and met her grandfather Vernon summer 1979 just a couple of months before he died.

Now the billon $ imperium Elvis Presley Enterprises (EPE) will be runned by her three daughters after her son Benjamin killed himself 2020.

I don't know anything about her drug abuse but i found this page today:

Mail One: Drug abuse and rehab - Lisa Marie admitted abusing cocaine, had FIVE stints in rehab (during fourth failed marriage) and became addicted to opioids after birth of her twin daughters