"48 Hours" looks back at cases involving serial killings in this YouTube marathon. Binge-watch the full episodes, which include "The Gilgo Beach Serial Killing," "The Shape of a Killer" and "Out of the Shadows." #48hours #crime #truecrime 0:00 The Gilgo Beach Serial Killing 42:04 The Shape of a Killer 1:24:18 Out of the Shadows True crime. Real justice. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives. Subscribe to the “48 Hours" YouTube channel: null Watch full episodes of “48 Hours”: https://www.cbs.com/shows/48_hours/ Listen to the "48 Hours" podcast: https://link.chtbl.com/48-Hours Listen to the "My Life of Crime with Erin Moriarty" podcast: https://link.chtbl.com/CBSNewsMLOC Follow “48 Hours” on Instagram: https://www.instagram.com/48hoursCBS/ Like "48 Hours" on Facebook: http://on.fb.me/1KkQuRn Follow "48 Hours" on Twitter: https://twitter.com/48hours Subscribe to our newsletter: http://cbsn.ws/1RqHw7T Download the CBS News app: http://cbsn.ws/1Xb1WC8 Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: licensing@veritone.com