I never was a JW.
My interest in this area is because before I retired (10 years ago) as a cop I spent ten years in command of a police Fraud Squad/Financial Investigation/Money Laundering unit. 'TNF' or 'Trust Nobody' was the motto.
Time and time again con-men repeated the mantra 'Con your family and friends first, because they're the easiest'. Numerous times, con-men had preyed on, or infiltrated in order to prey on, religious groups to find a rich new field of victims. After all, 'if brother xxx is 'one of us' of course we can trust him'. Sadly not.
The 'golden rule' in all of this is 'follow the money' - and this can be quite complicated. It doesn't necessarily mean cash. Who's living the lifestyle with no visible means? Who's driving the luxury cars? You get my drift.
Just out of interest I researched via the UK Charity Commission website my local JW KH and its trustees, then did a Google view search. Interesting, to say the least.