Thanks to the contributor who sent in these images. This dead eagle was found on a Scottish grouse moor in 2010. Tests showed it had been poisoned with a banned pesticide. Nobody has been charged.
It seems that unless the poisoner is actually seen placing the bait AND unless the eagle is actually seen eating from that bait (how unlikely is that?!) a prosecution will not be forthcoming. We know from experience that even with filmed evidence of illegal activities a prosecution is not guaranteed. This ludicrous situation sends a clear message to the poisoners: carry on, you are immune from prosecution.