Brad Pitt's child abuse investigation is about to be dropped by the FBI.

After allegations that Pitt struck his 15-year-old son Maddox on a private jet on September 14, the L.A. County Dept. of Children and Family Services started an investigation and then turned it over to the FBI, which has jurisdiction. The FBI were looking into the incident, but it never became an official case. A source told TMZ that the FBI said the matter should never have even been referred to the agency.

Last week it was reported that estranged wife Angelina Jolie didn't want Pitt to face criminal charges, and the website reported that Jolie would not cooperate with law enforcement officials if there was a move to file child abuse charges. There were claims Brad "struck Maddox (in the face)" during the alteration on the jet, though other insiders say the star did not hit his son, but instead lunged at him, making contact with the teen's shoulders.

On September 30 Pitt and Jolie reached a temporary custody agreement, which will last three weeks. Jolie will get full physical custody of Maddox, 15, Pax, 12, Zahara, 11, Shiloh, 10, and twins Knox and Vivienne, 8 while Pitt gets visitation rights. The initial visit will be monitored by a therapist, who will then decide to allow or deny the actor unmonitored visits. Both Jolie and Pitt will also go to individual counseling and family therapy with their kids.