Depending on the edition, speak with dead requires the corpse to have a working jaw, so just destroy that. If you hide the head, someone can just find it.
And if you can't find all the pieces, what then? And even if you did, assuming a human skull is an "object" (which I dispute), there will certainly be more than a single tear or break. So what, is each pair of puzzle pieces now an object you can cast mend on?
I don't think that matches the intention of the spell at all.
Although CSI Faerun would be kinda fun, so maybe I'd allow it.
This is all stuff you'd have a reason to know in character when a setting includes something as impactful as the ability to use the dead as a witness. If the victim can be a witness, you need to either fool or silence the victim post-mortem.
There are many ways to keep a witness from identifying you. You just need to be creative.
Yes DM, this comment right here.
I see you have a lot of experience in the field
I'm writing a murder mystery adventure in my spare time, so... Yeah, it came up.
Depending on the edition, speak with dead requires the corpse to have a working jaw, so just destroy that. If you hide the head, someone can just find it.
Why hide it? A maul is cheap.
Mending fixes a single tear or break in an object. No way should that work on a head that's been splattered halfway across the Sword Coast.
And if you can't find all the pieces, what then? And even if you did, assuming a human skull is an "object" (which I dispute), there will certainly be more than a single tear or break. So what, is each pair of puzzle pieces now an object you can cast mend on?
I don't think that matches the intention of the spell at all.
Although CSI Faerun would be kinda fun, so maybe I'd allow it.
This is all stuff you'd have a reason to know in character when a setting includes something as impactful as the ability to use the dead as a witness. If the victim can be a witness, you need to either fool or silence the victim post-mortem.