I assume this happened really fast. Is it possible the controller might have been looking for him on 22?
I just looked on Google Earth at the relationship between the tower and the two runways, and...well, I can see how the controller, even if he was paying some attention, could have missed the fact the plane was at the incorrect runway. With it being dark, all he would have seen was a mess of lights down there, and it would have been difficult to tell the aircraft's orientation until it began rolling down the runway...at which time it would have been too late.
I'm still very interested in seeing what the airport lighting situation was...
Possible, but the departure end of 26 is in the line of site to the departure end of 22 from the tower, or close to it anyway.
This is an actual map of the airport issued by FAA.
http://www.naco.faa.gov/d-tpp/0608/00697AD.PDF