LOS ANGELES -- Mel Gibson's estranged wife has filed a court declaration stating she and her children never experienced any abuse by the Academy Award winner.

A source familiar with the case but not authorized to speak publicly tells The Associated Press that Robyn Gibson filed the statement in a custody hearing between her husband and his ex-girlfriend, Oksana Grigorieva (gree-GOR'-yeh-vuh.)

Robyn Gibson filed to divorce her husband of 28 years in April 2009. The divorce is ongoing.

Neither Mel Gibson nor Grigorieva appeared at a daylong hearing in the custody case held Thursday in Los Angeles. The hearing was conducted in closed session. The former couple have an 8-month-old daughter together.

Sheriff's detectives investigating Gibson for possible domestic violence obtained audio recordings from the court Thursday.