Two promising college students stand trial after a teenager is lured to her death with a smartphone app. "48 Hours" correspondent Peter Van Sant updates the case. Watch more full episodes of "48 Hours" on Pluto TV. #48hours #crime #mystery Crime. Social justice. Impact. "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: http://bit.ly/1DvRWbT Watch full episodes of “48 Hours”: http://bit.ly/1fop6N1 Follow “48 Hours” on Instagram: http://bit.ly/1OLG2B9 Like "48 Hours" on Facebook: http://on.fb.me/1KkQuRn Follow "48 Hours" on Twitter: http://bit.ly/1MOCAXf 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