"48 Hours" investigates the murder of college student Ally Kostial

A 21-year-old college student was shot multiple times after a night out. An Apple watch helped lead investigators to her killer. Michelle Miller joins "CBS Mornings" for a preview of her "48 Hours" report "What Ally Kostial Didn't Know." Each weekday morning, "CBS Mornings” co-hosts Gayle King, Tony Dokoupil and Nate Burleson bring you the latest breaking news, smart conversation and in-depth feature reporting. "CBS Mornings" airs weekdays at 7 a.m. on CBS and 8 a.m. ET on CBSN. Subscribe to “CBS Mornings” on YouTube:    / cbsmornings   Watch CBSN live: http://cbsn.ws/1PlLpZ7c​ Download the CBS News app: http://cbsn.ws/1Xb1WC8​ Follow "CBS Mornings" on Instagram: https://bit.ly/3A13OqA Like "CBS Mornings" on Facebook: https://bit.ly/3tpOx00 Follow "CBS Mornings" on Twitter: https://bit.ly/38QQp8B Subscribe to our newsletter: http://cbsn.ws/1RqHw7T​ Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: [email protected]