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I don't think that was it. This was definitely American-made. There was DEFINITELY a couple that got hunted while out camping in the woods near a creek. Girl was bathing in creek, notices boyfriend, who had left to pee on a tree earlier had still not come back. She then goes and finds him PINNED to the tree with a crossbow bolt...
Say to the others who did not follow through You're still our brothers, and we will fight for you

... In which a murderer is acting out the events of this mystery writer's book, and they think it's the writer, but it turns out to be someone else, who turns out to be an accomplice of the writer.
At some point a couple is in the woods and the hunter pins the man to a tree with a crossbow, and chases the woman and shoots her with the same.