Under cross-examination Thursday, Annie George says a recording of a woman talking to Valsamma Mathai's son, Shiju, was not her voice.
In the call, the woman also appears to acknowledge she knew Valsamma Mathai was in the country illegally.
George also repeated her claim that she didn't mistreat Mathai during the 5½ years she worked in her 20,000-square-foot home in suburban Rexford.
Mathai testified that she slept in a closet, worked long days without vacation, days off or sick time and wasn't allowed to leave the property.
