Engrenages (Spiral, French TV series)
 

If you liked the Killing then chances are you'll like this :) the first series is being run on BBC4 at the moment (the first two episodes were on last night, so catch them on iPlayer) - it's quite a similar premise: young girl is brutally murdered in Paris and the series follows the detectives' hunt for the killer.

I wouldn't say they're the same though. For starters, Spiral was broadcast in 2005 :tongue: and this seems to touch more on crime and youth problems in Paris rather than a personal tragedy angle.