Disclaimer 1: None of this is by me.
Disclaimer 2: Youtube links.
The chorus is definitely not locrian, but the rest of the song is debatable.
To hear just the song, skip to 12:38. The composition process is interesting too.
John Kirkpatrick — Dust to Dust
Well known in music theory circles as “that song that's in locrian”.
The Improving Musician — Ah, Poor Snail
Lisa Germano — In The Land Of Fairies
Fernie Canto — Quando a Poeira Baixar
Juan Antonio — B Locrian Scale Packs Backing Track
A. Maayani — Waltz No.7 in Locrian Mode
Evan Bennet — Gnossienne in F Locrian
Anton Machleder — Locrian Canon
Final Fantasy VI — The Mines of Narshe
Copycat Shasta — Call Me Maybe but LOCRIAN
The melody in locrian sounds almost desperate. The bass is actually in phrygian, however.