The Frozen Ground (2013)

Alaska Trooper Jack Holcombe believes Robert Hansen is a serial killer who abducts young girls, tortures and sexually assaults them, then kills them. But Holcombe doesn't have enough evidence to get a search warrant for Hansen's premises. Holcombe knows that one victim, Cyndy Paulsen, somehow survived, so he decides to seek her help, but he finds that she's now a junkie with trust issues. Holcombe has to earn her trust; meanwhile, Hansen is still hunting and killing girls.