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MONCKS CORNER, S.C. (AP) -- The former girlfriend of a man charged with killing his young son and then putting the body in a trash can filled with concrete says he wiped the victim with peroxide to get rid of fingerprints.

Grace Trotman also testified Tuesday that Roger Anthony Williams often hit his 2-year-old son Rodricus Williams.

Williams is on trial in Moncks Corner on a charge of homicide by child abuse in the youngster's death.

Authorities say the 31-year-old Williams and Trotman concocted a story that the child had fallen into the water off Charleston's Battery on July 6, 2010. They say that two days later, Trotman led police to the child's body in Orangeburg County.

Trotman has pleaded guilty and will be sentenced after Williams' trial.

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