Even better is that they are OBVIOUSLY not Killian's signatures. All you have to do is put them up beside a bunch of undisputed siganatures and the public can see for themselves.
The "OUR EXPERT SAYS" loses its credibility if the public can see the evidence themselves. A 12 year old could correctly identify the false signatures in a line up. Just showing the signatures beside known signatures will expose the fraudulent appraisal.
Now that I think about it, I think the best thing is to (about the forgieries) is just make sure people can see the evidence themsleves. I'm not even sure we need to draw an editorial opinion for it to be effective... just show the evidence, point out the significant issues, and leave it to the reader to decide.
I remember, back before I had any reason to doubt the talking heads, seeing the FLIR footage live on CSPAN during some sort of hearing and thinking, "HOLY ****, they're shooting those people". (No "expert" told me, I could see it myself.) I was aware when all the controversy in the news about the FLIR footage being re-enacted was on all the networks, the obsurdity of all the opinions expressed about it, but no one ever showed the controversial footage on the air while they were talking about it.
If people can see for themselves, the "experts" lose their ability to lie.