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In page Blanche Barrow:

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The gang's loud, drunken card games and an accidental discharge of a Browning Automatic Rifle by Clyde led to neighbors reporting suspicious men to law enforcement and local police began watching the apartment. After a while, a raid was organized for April 13, 1933. Two armed carloads of local police pulled up to confront what was suspected of just being a group of bootleggers. The gang had been on the verge of leaving that day. Clyde responded to the police by instantly opening fire. Two of the policemen were killed, while others took cover from the automatic weapons wielded by the gang.[citation needed]