( September 26, 2023, 1:36 PM EDT) -- SAN FRANCISCO — A Mexican film producer’s son and his companies argue in an appellant brief to the Ninth Circuit U.S. Court of Appeals that a district court erred by confirming an $8.7 million arbitral award in favor of his father’s estate, companies and other children, arguing that the lower court incorrectly found that they untimely raised a challenge to the tribunal’s jurisdiction based on allegedly forged evidence....