Lester Chambers was attacked at the Hayward Russell City Blues Festival in the San Francisco Bay Area last month. The woman, 43-year-old Dinalynn Andrews-Potter of is charged with felony counts of assault and elder abuse.

Chambers is a member of the Chambers Brothers, best known for their 1968 hit "Time Has Come Today."

Lester Chambers had just dedicated a song to Trayvon Martin when he was attacked.

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