@goldcd Re: ".........the many people forced to share a working life with him.........."
That is a bloody good point and I will admit had not occurred to me before I read your post. That the "imposter" is possibly/likely a colleague would certainly be frakking embarrassing if they had succeeded in revealing his identity. Indeed it may have been their own lawyers review of the case when they were assessing the likelihood of being able to make the "hacking" charges stick when it suddenly dawned on someone that they couldn't if the "guilty party" could gain this info by legal means. Not surprising that they performed a "screeching u-turn"!