In a horrific incident in Bihar, a Dalit woman was stripped and assaulted by a local moneylender and his aides after she and her husband refused to pay additional interest on a loan of Rs 1,500. The couple had repaid the whole amount, but Pramod Singh was demanding an additional interest on the loan. The woman alleged that the moneylender's son urinated in her mouth. Tonight, we ask - amid all the calls to end casteism, why do these incidents keep happening?