If I recall right, the reason it was considered insider trading was that he had published numbers expecting a contract from the government. When he chose to stand up for principles, the contact never landed, which made those predictions false.
I'd appreciate a clearer explanation of this, but last time I read about it, it really did seem like the loss of the contract was out of revenge, and that his prosecution would never have happened had he caved to the requests which he felt were unconscionable.
Insider trading by itself is not a trumped up charge - probably none of the charges possible by the US Code are by itself. What makes it trumped up is the particular circumstance - the details of the case. And the details look definitely very fishy.
They've been merged into CenturyLink, but I doubt that's because of losing some government contracts. Those would be a drop in the bucket for an ILEC. USA telco consolidation is inexorable, for anti-consumer reasons. Actually it's only a matter of time before VZN acquires CenturyLink and then spins its less profitable/deadwood pieces back out to private equity firms. Much money will be made by executives, and much wailing to PUCs will be heard when service craters.