According to a private investigator, a mystery box of Marilyn Monroe documents sealed until 2039 might indicate she was murdered by her obsessive psychiatrist.

Private detective Becky Aldrige told Sun Online how she uncovered the package of papers “restricted until 2039” in a university library in Los Angeles, which she believes may hold the answers to how and why the movie legend died in 1962.

Dr. Ralph Greenson, Marilyn’s personal psychiatrist, who discovered her dead at her house and is suspected by some of murdering her by injecting her with a deadly dosage of pentobarbitol.

Aldrige pursued leads until she stumbled upon Box 39 in the UCLA library’s special collections area. The box belongs to Dr. Ralph Greenson, and the contents list reveals that it contains a number of documents and correspondence relating to Marilyn.

Monroe’s organs and tests, as well as many other key records connected to her death, have vanished, according to The Sun. Aldrige believes that this key will provide details about the actual reason of her death, which she believes was not a suicide.

Dr. Greenson murdered Monroe, according to Aldrige, when she threatened to divulge affairs she’d had with the Kennedy brothers, and he was tormented by the actress for the rest of his life.

“I’m 100% positive Marilyn Monroe did not commit suicide – not if you go by all the facts of the case,” Becky revealed.

“There’s so many unanswered questions and there shouldn’t be.

“Marilyn Monroe was the only person whose organs and tests and everything that had been with her death disappeared. How does this happen unless it’s a cover up?

“And now we discover Box 39, which contains a bunch of sealed files from her personal doctor, who I believe is responsible for her death.

“I firmly that the answers to what happened may be hidden in these files.”

The library staff is taking great care to ensure that this box and other associated evidence are preserved. Aldrige claims she was not permitted to take photographs or create copies, so she made meticulous notes on everything she could.

The library’s staff insists on keeping the box sealed until 2039, as per the instructions.

“I spent hours looking at everything I was allowed to – I couldn’t make copies or take pictures so I just took notes,” she explained.

“I discovered he was obsessed with Marilyn Monroe because he had every book, every magazine, every newspaper that was ever written about Marilyn Monroe, everything.

“Then there were letters that were written to him, people telling him to kill himself because they thought it was his fault, she was dead. I remember thinking ‘Why did you save this?’

“So when I got to Box 39 they told me it was sealed until 2039. I did everything in my power to try and look at those files, but they wouldn’t let me.

“I know that inside there is a manuscript written by Greenson’s daughter Joan about her ties with Marilyn Monroe and what happened that night.

“Apparently she claims in that manuscript that her father got the call at midnight – not 3am – which would make more sense giving that the neighbors say they saw an ambulance at 11:30.

“There is also letters in there to Marilyn Monroe from other people – and letters she wrote to other people – why does he even have those? There’s also some of his confidential medical files, and another file that doesn’t say what it is.

“I still don’t even know if Greenson sealed them, or his daughter Joan – or somebody else.

“And I don’t know why 2039 – is it because by then Joan Greenson will be dead too? I’ve tried to reach out to her but had no response.

“I believe the answer to what happened to Marilyn Monroe can be found in Box 39 or at the very least I think there might be more information that people need to see.”

Aldrige has filed a petition to have the ‘probable suicide’ finding removed from Monroe’s death certificate and the case re-investigated as homicide.

She wants the Attorney General to talk with two persons who, she claims, are still alive today and were never asked to give a statement but were present when Marilyn Monroe died.

They are LAPD Sgt. Marvin D. Iannone, who eventually became Chief of the Beverly Hills Police Department, and Monroe’s friend Patrica Newcomb.

Becky, who owns the Ariel Investigations firm in California and New Mexico, says she started looking into Marilyn’s death a few years ago and was shocked by the large number of discrepancies she discovered in witness testimony – as well as other suspicious circumstances like the lack of a suicide note.

“Marilyn Monroe did try to commit suicide before. – we all know that. But in those attempts, she always left a suicide letter and it is mysterious in this case there was none left,” she said

“There was also no vomit which are found in overdose victims, plus she had the strange bruises in her hips which is a common place where injections could have been put or it could have been caused by a violent struggle.

“Another thing is her housekeeper Eunice Murray said she was concerned because Marilyn was awake and the light was on. Why would she be concerned? Marilyn was an adult – if I saw someone’s light underneath the door, I sure wouldn’t be concerned.

“Also my understanding is that when Marilyn Monroe first moved into that house, she had new carpet put in that room and it was so thick and high, but it was impossible to see under the door so how could she see the light?

“Plus she then rang Marilyn’s psychiatrist Dr Greenwood, why ring him first if you are so concerned – surely you would call the police?

“They claim they had to break into Marilyn’s window but Murray had a skeleton key to every door – and the glass was found outside the property not inside even though it was supposedly broken from the outside.

“And there’s the diary which many people said they saw, in which she apparently mentioned the Kennedys.

“Even Marilyn’s friend and publicist Pat Newcombe told me there was a diary. But where is that diary? It just disappeared.

“There are so many things that just don’t add up.”