@purplemon18 wrote:
I know I'm not really helping because it's too late now, but for the rest of this case, and all future ones, I would avoid any implication that I may accuse them of deceipt. At least until I am actually ready to accuse them.

Agreed. The objective is to get the relevant information in a pleasant and co-operative manner, and the personal element is best kept right out, not only because it is wrong to implicitly accuse someone of wrong-doing, but also because it's counter-productive.