Twisted (2004)

Ashley Judd plays a cop with issues.  She's just been promoted to Detective Inspector which doesn't sit too well with the chauvinists in her department.  She also drinks too much and likes picking up men for rough sex.  And now the latter are turning up dead.  She just can't forget that her cop father killed himself and her mother some years before.  What we are meant to guess is whether she's the nutcase committing these crimes or whether it is her new partner, Andy Garcia, or whether her dad's ex-partner who raised her, Samuel L. Jackson has a hand in the dirty deeds.  The film is so poorly put together that you really won't care.