Did Maedhros kill Laughter?

[Nerwen]

Originally Posted by Urwen

P.S. And as for the geese, they didn't work against Lalaith, but for her. Don't you see? They didn't want buttefly to take the credit! They wanted Lalaith herself to save her siblings, not some darn butterfly! And that's why they told her to squash it!

So, what went wrong? You know, seeing as Túrin and Nienor did, in fact, both come to a bad end? Remember?