Here is how they gradually were found out:
https://torontolife.com/deep-dives/gill-sisters-pretendian-fraud/THE GREAT PRETENDERS
Karima Manji wanted it all for her twin daughters, Amira and Nadya. And she found a way to help them get it: financial aid earmarked for Indigenous kids. The fact that they weren’t remotely Indigenous wasn’t going to stop her
BY SARAH TRELEAVEN | FEBRUARY 14, 2024