Los Angeles Police Chief Charlie Beck stands outside the scene of a standoff in the Sylmar section of Los Angeles on Monday, April 4, 2011. Police blasted tear gas into a home and traded gunfire ... more 
Los Angeles Police Chief Charlie Beck stands outside the scene of a standoff in the Sylmar section of Los Angeles on Monday, April 4, 2011. Police blasted tear gas into a home and traded gunfire Monday with a man believed to have shot and critically wounded an officer during a nightlong standoff. The man remained barricaded in the Sylmar home for more than 12 hours as police and Los Angeles County sheriff's officers in armored vests and helmets surrounded the house. less 
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Associated Press | Photo By Al Seib, Pool
Tue, Apr 5, 2011 5:39 AM EDT