Ricardo Rivera was watching TV in his bedroom in Monterrey when he heard gunshots.

Fifteen armed men stormed his house wearing hoods, ordering him, his brother and his mother to the floor. They filled a backpack with money and jewels, beating Rivera and his brother, Roy. The bulletproof vests they wore bore the symbol of the police.

When they left, they took Roy Rivera with them.

"My brother never came back," Ricardo Rivera told a crowd gathered at the Capitol on Saturday.

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