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An autopsy has determined that BART police Sgt. Tom “Tommy” Smith died from a single gunshot wound to his chest, an Alameda County sheriff’s spokesman said Thursday.

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CalMatters is a Sacramento-based nonpartisan, nonprofit journalism venture committed to explaining how California's state Capitol works and why it matters. It works with more than 130 media partners throughout the state that have long, deep relationships with their local audiences, including Embarcadero Media.