Martin Scorsese on "Killers of the Flower Moon" | Viet Thanh Nguyen on Memoir "A Man of Two Faces,"

"48 Hours" investigates the murders of two young women in Phoenix, Arizona, that was solved decades later using genetic genealogy. "48 Hours" correspondent Peter Van Sant joins "CBS Mornings" with a preview of his report and shares how a man known as the "Zombie Hunter" became a prime suspect.More schools across the country are requiring students to lock away phones during school hours. CBS News' Meg Oliver spent the day at a high school in Newburgh, New York, to see how going phone-free has transformed the school experience. She also sat down with a renowned social psychologist who has been researching the connection between phone use and declining mental health, calling it "worse than vaping."Pulitzer Prize-winning author Viet Thanh Nguyen joins "CBS Mornings" to discuss his new memoir, "A Man of Two Faces," which has been called one of the most anticipated books of the fall.Martin Scorsese's new Apple Original film, "Killers of the Flower Moon" is a story of racism, exploitation and murder on the Osage Reservation in Oklahoma. The tragic and true story takes place in the 1920s when oil was discovered on the land, attracting mainly White people who plotted ways to steal property rights. "CBS Mornings" co-host Gayle King sits down with the director in Los Angeles.