Book advice

[Laradv]

Hi all.
About 15 years ago, I read a brilliant book and would love to read it again, but cant remember the aurthor nor the name of the book.

Storyline is about a women who commited a murder, but after further investigation it was found she has multiple personalities and it was actually one of those personalities that commited the murder. It was briliant and I remember finishing it in one go.

Anyone that maybe can guide me to the name of such a book or even a book that resembles such a storyline please.

The two books I’ve read about multiple personalities are ‘Sybil’ and ‘When Rabbit Howls’ although I don’t think the characters committed any murders. Ages since I read them though.

Or it could also be Tell me your dreams by Sidney Sheldon?

There was one by Faye Weldon about a woman with multiple personalities but don't think there was a murder.