As the custody battle with his ex-girlfriend Oksana Grigorieva over their 9-month-old daughter Lucia rages on, the actor recently requested that an independent observer accompany his visits with Lucia, a source tells PEOPLE.
Although the move was not requested by the court, Gibson was eager for an unbiased set of eyes to witness his interactions with the child, the source says, so that "Oksana couldn't lie."
The observer, who has family law-related credentials and was approved by Department of Children and Family Services, was present this weekend when Gibson and Lucia hung out on the grounds of the actor’s church.
"[The chapel] is a safe place for them to be together, run around, have fun and play," says a Gibson pal.
A source close to Grigorieva confirmed there's a monitor and she "has not expressed an opinion on that one way or the other."
Gibson is allowed unsupervised visits with Lucia, but voluntarily requested the monitor during the all-out custody war and legal battle that includes allegations of domestic violence, extortion and child endangerment.
Additional reporting by OLIVER JONES