No, these were not "legal", but financial matters! "Legal" matters would have been, if they had discussed in public, what they did, that Senior wanted the part of the inheretence from Junior back, he had gifted to Junior - because of, how he did put it, big ungratefulness...
And this legal question leads to the "cui bono" thingy: Who benefits most, if Senior ends up locked up and declared unfit to do business?
And since to world is full of suspicious minds like mine, at least Junior would be well advised, to wash his hands in innnocence - publically. Or to ride in and to help his father, what would be even better!