It was a fake, unfortunately. Guy altered the Part 14 shot with Laura's teeth from the prom photo, *then* put Laura's prom photo next to it, and voila!

That too! Our Percival. (Or Galahad?)

Andy has a history of doing the most important detective work:

Stanton does have a connection — *spoiler alert* for Secret History of Twin Peaks: his character, Carl Rodd, was abducted as a kid along with Margaret Coulson, a.k.a. The Log Lady.