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The US police has announced a cash reward for providing leads in the murder of Indian-American mother and son who were found shot dead at their residence in a suburb of Washington DC. Mala Manwani, 65, and her son Rishi Manwani, 32, were found dead inside their home on Wednesday afternoon. The police was called to the 25000 block of Tomey Court Wednesday after one of Mala Manwani's co-workers at CSRA ' where she was an accountant ' reported that no one had heard from her since Monday afternoon.