She had epilepsy. She was found dead in the bathtub. They ruled it accidental death. They think she had an episode and hit her head on the faucet and then drowned.
There were 2 wine glasses next to the tub. Apparently her husband/ boyfriend was a real tool. They never investigated more but my dad is convinced she was killed by him.
It was the 70s. Today would be a different investigation for sure.