So you're implying that two freemason's may have conspired to cover up criminal activity.
Whether they did or didn't I've no idea, but if they did so, it would have been because they a pair of criminal arseholes, not because they're freemason's. There's absolutely nothing in freemasonry that compels one to assist another in criminal or immoral activity, in fact there's an awful lot to the contrary. That's not to say that there aren't mason's who are criminals or immoral, of course there are. But it's not because they're mason's, and neither is it in any way protective of such people.
what would you say the main reason is for people joining the masons?
IMO it's related to networking, the increased access to fellow masons in other fields who're potentially able to assist you in your career progression / throw some work your way in a you scratch my back, I'll scratch your back kind of way.
obviously alongside the fellowship, social aspect of things, but why the masons and not a few pints down the working mens club, or just going out with your mates to a bar?
What I'm saying at a basic level is that this can work as much for the criminally minded (or at least in this case a highly respected member reaching out and asking a favour on behalf of their son) as it does for a builder, solicitor etc.
I believe this sort of thing is technically against the rules, but can you really say that no back scratching of this nature goes on?
I'd also suspect that there's a bit of a general 'what goes on at the lodge, stays at the lodge' type of ethos to it, which could lead some to a level of indiscretion they'd not let themselves be seen doing in public in a normal bar, as with the case of the strippers and high ranking coppers, which then opens them up to the potential to be a bit more pressured into doing favours they'd not really want to be doing, which is where the real corruption can start coming in.
That's not really heresay btw, as I heard it straight from one of the girls involved, and we were basically partly using the same tactic at the time by bringing her with us to an official meeting with them where they looked decidedly shaken to see her walking through the door (we didn't even need to say anything, the implied threat was enough).
ps - please don't quote this post, I may well decide I need to delete some of this as it might give away the identity of the person I'm referring to.