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Tong Van Le died after someone shot him as he sat in his car outside of his home on Novato's Pizaaro Avenue last September.
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Investigators believe his killers followed him home from the liquor store he ran on Crescent Avenue in San Francisco.
Monday, authorities arrested a /*Muni*/ bus driver and her son. They suspect the son of belonging to a gang.
Two other suspects were already in custody.
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