Recently heard about this movie (could also be a miniseries). It is about an estranged brother and sister; the sister grew up and is possibly a detective (or cop) who is investigating mysterious murders/disappearances in the nearby woods. She isn’t sure what happened to her brother. The killer is a wildman/caveman type guy who wears antlers. She kills him at the end and only then realizes it is her long-lost brother. I feel like it came out fairly recently and I believe it was Scandinavian.
I’ve tried Googling in vain. Any help is appreciated!
I’ve ruled out The Silencing, the Chestnut Man, Cold Prey, Black Spot, and Fenris.