Signing a Last Will: can it be assisted suicide?

Sighing a will is not the same as not stopping someone from killing their self
just because 'John' was a gloomy person doesn't
mean you knew he was suicidal,
sure looking back you might think
"I should have seen the signs"
"I could have helped him"
well yeah, maybe
I can't disagree
but what happened happened
and if you think signing a will was akin to
letting 'john' kill himself
think, would you 'Not' put a gun in your mouth
if your to best friends refused to sign your will?