Greenidge's comment gives credence to the old adage: the best thieves make the best policemen.

There's and old time saying which reads "the best thieves make the best policemen". It simply means that those who pilfer have to study all the angles and know them through and through which makes them most suitably qualified to guard against persons with similar inclinations.

This was point was fully exemplified when Finance Minister in the PNC led government and APNU member of parliament, Carl Greenidge during his most recent foray into the press sought to educate Robert Persaud on his new ministerial remit.
Greenidge, who broke every rule in the book when the PNC under Burnham and then Hoyte destroyed our economy, certainly studied the rules he traduced!