Marilyn Munroe - The un-answered questions

Suicide: This is the official cause of death and probably the most widely believed. She had tried it four times 
Accident: Marilyn died from a rectally-administered barbiturate enema, the question is who prepared and administered it
Murder: It’s important to distinguish the cover-up of embarrassing information by powerful people from the commitment of a crime to eliminate people who can potentially create embarrassment.

The unanswered questions.
What happened to the diary
The death of Bernard Spendell who discovered the house of Marilyn was bugged from top to bottom.
Who adminstered the fatal rectal overdose