Black and White (1999)

Thriller starring Gina Gershon as hard-edged, experienced cop Nora 'Hugs' Hugosian, who is assigned a new partner--rookie cop Chris O'Brien (Rory Cochrane)--to help her with the serial-killer case she is working on. The two begin a passionate affair, but it isn't long before Chris has suspicions about Nora's real involvement with the murders.