Another note of support for Allan.
When I was an active mechanic (and flight instructor) we used to say that the person who died after signing the fewest things, wins (partially with this type of mess in mind, and partially with the more typical regulatory mess in mind). The corollary in General Aviation was to tell those whose planes you worked on to carry the airplane logs on board
Now that I'm a semi-active attorney, I see these cases on rare occasion. Should have been dismissed [at least against Allan] long before a verdict.
If the captain was well known as a CRM disaster waiting to happen [as some have implied on this forum], maybe some charges could stand against the management--that's a very fact intensive determination and tough to do in the politicized environment after a crash. I'm personally not prepared to take a stand one way or the other on the management, but the mechanic should never have been charged.