A cold case of two sisters last seen in St. Cloud and found dead in a granite quarry nearby has been unsolved for 50 years.

5 EYEWITNESS NEWS Reporter Eric Chaloux talked to law enforcement on Tuesday about the ongoing case and how they are now using QR codes for people to provide tips.

5 EYEWITNESS NEWS has been following the case for decades.

Watch our story from 1999, on the 25th anniversary of the girls’ disappearance.