I don't think the digital mouse story was ever verified.
My understanding is that it is often the case that crew see a deviation, can't find an immediate explanation - ask a flight attendant to check whether there are any computers/handheld devises being uses. Answer is yes - conclusion drawn.
then incident cannot be replicated.
Might as well ask whether any blondes in the cabin - answer is yes 10 - ergo - 10 blondes will cause navigation deviation.
