The Mysterious Patient

"Who are You?"
"what's your name?"
" Are you aware that either you are a suspect or witness to seven brutal murders?
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She has been there. Always. None of the staff or patients has ever heard her voice. She sits there like a mannequin. Her identity was unknown.
Who was she?
What is her name?
Where is her home?
No idea.
She was just there one day.
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Seven murders.
Motive unknown.
Killer unknown.
Cause of death unknown.
The police have no other evidence to investigate.
Except for one person.
A mysterious unidentified woman.
Either a suspect or a witness.
But what will they do when she doesn't even speak, she doesn't even respond.
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He was a successful psychologist. He has saved people. Saved their dreams. His dreams were of a happy family with his love and their upcoming child which was going to happen soon. But suddenly everything just becomes a dream. What remained was the memory of a blood bath of the woman he loved dearly.
He needs answer.
And if the woman is the key, then he will make her speak.
But is he ready to hear the truth?

But again,

Who was this mysterious woman?

Who is this mysterious patient?