Did Maedhros kill Laughter?

[Mnemosyne]

Actually Urwen/Lalaith was called back from wherever she had been (I still hold to my theory that she had never died) to rejuvenate the landscape of Mordor after the fall of Sauron.

It is said that daisies sprung up in her footprints, and that goose poop is a better fertilizer than nothing.

So, you see, the phantom really was right to assign her to Mordor.