Alena (2016)

About Alena, a painter, who was abused by her father when she was a kid, which causes her a schizophrenic problem of which she is not aware. She's a sweet, caring girlfriend, but when she discovers that her boyfriend Mike and her model Jane cheat on her, she kills Mike without knowing that. A detective investigates the murder and starts having feelings for Alena.

Unfortunately the movie Alena is not yet available on HBO Max.