“Eventually I think we’re going to have to negotiate,” John Foley said in an interview on French radio. “This situation is not going to be solved by military intervention and money alone. So at some point in time, people are going to have to talk.”

Foley’s mother Diane agreed that “we need to talk with them” and that ISIS needs “to be understood by our world.”

She said in the interview with Europe 1 that the U.S. should “reevaluate the policies about negotiation with terrorists” and Foley’s father conceded that while a ransom may not have saved his son’s life, “it wouldn’t cost anything to negotiate.”

Foley’s mother said Friday she believed the U.S. government tried “very hard” to try and free her son, but in an interview with CNN’s Anderson Cooper last month, the bereaved mother said she was “embarrassed and appalled” by how the U.S. government handled her son’s abduction.