This sounds like a part of the French "Murder in ..." series that I've watched several of. It's not: it is instead a series of three movie-length (90 minutes each) mysteries in Provence - in English. It may of course have been inspired by that series.

Our protagonist is Antoine Verlaque (Roger Allam), a judge in Provence. They make a point of explaining that judges are different in France, being a part of the investigation more than sitting in courtrooms - almost like this was written for an English audience. He's assisted by police woman Hélène Paulik (Keala Settle) and his romantic partner Marine Bonnet (Nancy Carroll) whose work eventually draws her into his work.

The series makes the best of its setting, showing sweeping and gorgeous shots of Provence in 1080p. The first two episodes are fairly good mysteries, but the third, while not necessarily "bad," really put me off by moving into extremely personal territory in the last few minutes of the episode. I apologize to anyone who's read me saying this before, but I want to watch detectives detect, not struggle for their lives. I wasn't loving the series (although it's not bad) before I hit the ending, and the last half hour really put me off.