Peter Rodger, an assistant director on "The Hunger Games," and his ex-wife released a statement after learning of the May 23 killings, but neither gave a formal interview.
Their son, Elliot Rodger, killed six people and wounded 13 others near the University of California, Santa Barbara campus, before killing himself.
The 22-year-old left behind several videos and a 137-page manifesto that revealed his plan to exact revenge on the women he perceived to have rejected him and the men who they chose over him.
Upon receiving a message their son sent the day of the killing spree, Elliot Rodger's parents immediately contacted authorities and raced to see their son, a family friend told ABC News. They reportedly were on the 101 Freeway headed to Santa Barbara when they heard news of the violence.
Peter Rodger's interview will air Friday on a special edition of "20/20" on ABC7.