law and order episode music???

[Didgey]

Hey there

I was wondering if someone could help me. I remember seeing the end of an episode of what I think was one of the LAW and ORDER series.

It involved one of the main characters (I think) walking through an empty house of which I think he had with a wife/partner and ended up in a bathroom and there was a note on a mirror? There was a nice song playing in the background, does anyone know what it was. Even the name of the episode/season/series would be of great help.

Thanks