Teeth in Memory.

♱ When the bodies of two twin sisters turn up in a small town church, a decade after the murder of their mother, FBI agent Ian Wainscott suspects the events are connected. No one believes him, so in a desperate effort to uncover the truth, he enlists the help of forensic archeologist Friday Barnes. There's two (three) problems with his plan, 1: she's been stuck in prison for the last four years for a crime she didn't commit and 2: he put her there.

(Three, they were about to be married).