For background only...
Courts of Law and accident investigations have very different functions and entirely different standards of allowable evidence. It is entirely normal, and has happened thousands of times, that an outcome in a Court of Law will be different to any sort of non-judicial investigation.
In aviation there is a very well known UK military case from about a decade or more ago, when a RAF pilot killed an individual through a flagrant act of flying indiscipline and clear breach of regulations.
He got off scot-free in a civilian law court and was then immune from military process under double jeopardy laws.
It was ever thus.
Ironically (and painfully for all) once a law case has failed it often proves difficult to apply non-judicial findings, because the regulatory body is then open to legal action itself.
Not saying any of that applies here....just saying that is how the world works.