The Legend of Korra, Book One: Air

Tenzin:
So you think Mr. Sato manufactured those gloves for the Equalists, then framed Cabbage Corp?

Lin Beifong:
That's a bold accusation. But what proof do you have?

Korra:
Well, I don't exactly have proof, but I know what I heard. Sato's up to something.

Lin Beifong:
He does have the means. And he has a motive.

Tenzin:
That's right.

Korra:
A motive? What is it?

Tenzin:
Twelve years ago, the Agni Kai Triad robbed Sato's mansion. A Firebender killed Sato's wife during the break-in.

Korra:
That's terrible.

Tenzin:
It was tragic. It is possible he's been harboring anti-bending sentiment all this time.

Lin Beifong:
Maybe we should look at Mr. Sato a little more closely.