In fact this started yesterday (saturday 31 May) and I had just skimmed over it as I thought it was, or it sounded like, a series that had already been shown.
But saw some reviews today saying it was really gripping.
Not sure I am ready for another series about women being murdered, but in case anyone is interested, it is available on iPlayer.
https://www.bbc.co.uk/iplayer/episode/m002cfql/the-black-forest-murders-series-1-1-a-village-on-the-hunt