Well.

As a human, if an ant comes along crawling over your kitchen table with a bread crumb...

Do you question why it is doing here? Or do you give it some time to get out of your sight before crushing it with a newspaper?
And of course, Bedivere wouldn't care for his information as that would be a hollow victory.
What victory would it be if you used the tools granted by the enemy?

See the humans allowed the vampires a victory at that point, and there's a great shame associated with that.
So I'm afraid Martin will most likely die unless there is some compelling evidence that Martin is not a human at all.
Being cryptic and bargaining isn't a good approach in such a case when one's life is on the line :I

And as we know from Mr. Stone's interaction, Bedivere isn't above saying "Carpe Noctem" and letting whatever happens happen believing himself invincible.