PHOENIX (AP) -- A woman whose baby was killed at the hands of her boyfriend four years ago is now charged with beating her surviving son at a store, authorities said.

Tina Lynn Tatum, 29, is facing two counts of child abuse, which carry a minimum prison sentence of 4.5 years combined.

Maricopa County Attorney Andrew Thomas announced Thursday that a direct complaint against Tatum had been filed in Superior Court.

Witnesses told police they saw Tatum hitting, punching and dragging her bloodied 10-year-old son inside a Wal-Mart in Mesa on Sunday.

Images of the attack were captured on cellphone cameras, police said.

The boy has since been placed with family members.

Tatum's 3-month-old son was shaken to death by her live-in boyfriend in 2003, according to authorities, and she was accused of failing to prevent or report the acts.

Tatum pleaded guilty in 2005 to attempted child abuse and was sentenced to a year incarceration and lifetime probation, court records show.

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Information from: The Arizona Republic, http://www.azcentral.com

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