I dont believe there was any robbery. Peterson pressed the action all night and Khan's punches had minimal effect. They were arm punches. He lacks power, and he hasn't learned how to punch hard while using his speed. Peterson worked great at cutting the ring off and getting inside. Khan was warned like five times before the 1st point deduction and then again before the second. He lacks proper foot work and balance in my opinion. He gets away with it because of his speed and agility, kind of like Martinez.
And as a side note, anyone who thinks Pacquiao won vs Marquez also has to think Peterson won. Just noting that for whoever is a Pac / Khan fan.