There is a distinct difference between an accident investigation by an appointed organisation (AAIB) and a manslaughter trial in a court of law. The conclusions drawn from the analysis undertaken by the former with respect to low Gz CI will be based upon the balance of probabilities of whether or not CI occurred and it appears that they found no evidence that it did, only that some sources consider that it exists (whilst others do not). However, for a guilty verdict to have been given by the jury in the criminal court the prosecution would have to have proven beyond reasonable doubt that CI did not occur. Therefore, the two criteria are different.