According to
Collins your (and his) usage is
old-fashioned...but no less valid, IMO. Their current usage being
"to try to avoid answering difficult questions".
His thought processes may indeed be tortuous but, to my mind, seem to be an attempt to cover all the bases. I think that is a good trait for a lawyer. Where he failed was in his appreciation of / support for the other side's needs...and I think that is something that is bred / trained into lawyers. Their duty is to best represent their client / employer rather than seek out any other detail...that being the purpose of the Court / Tribunal or other proceeding. Is this not usual in an adversarial justice system?
As a civil case lawyer he seems to have juggled the demands that POL put on him as regards criminal cases, pressure from the press, etc rather well...as far as his employer might be concerned. Their interest was not concerned with the well-being of their SPMs, as is all too apparent.