As far as I know, he's pretty screwed. He could try to find out when that officer last got certified for Speed Estimating (or something like that). I believe that they have to go in every so often and estimate how fast several targets are moving and they can only be off by like 5 MPH or something like that.

Also, were there any circumstances that might affect his ability to determine said speed (i.e. was it raining, foggy, or otherwise low visibility, lots of other cars, etc...). You'd also have to figure out if your buddy was followed for a while, or if the cop was stationary, or if he was going the opposite direction (but honestly trying to figure all that out is a waste of time unless you are really gonna try to fight it the long way). I had my 16 point "Leaving the scene of an accident" reduced to a 2-3 point "Failure to signal lane change" because it was about to snow and I couldn't get a tow truck out to the mountains in time (this was in Colorado).

There are too many things that come into play to give you a definite answer on what to say in court, or what plea would be the best available. Best you can hope for is that he doesn't show up. Also, if you or your buddy is going to college, some schools have a legal department (they won't represent you, but they're a good source of legal info).