( NewsNation) — As National Missing Persons Day is observed, there are more than 26,000 active missing cases in the U.S., with family and friends still waiting to find out what happened to their loved one. Many people who are reported missing are located, but in some cases, families are left without answers for years or even decades.

The missing files occurred under Burns’ predecessor, Penny Jones, but Burns said his department has evaluated the issues and is working to correct them.

Chicago P.D. season 13 episode 12 focuses on Imani leading a reopened missing child case, as new evidence raises questions about what happened to Ben 25 years ago

Some individuals have been missing for weeks, while others have vanished months or even years ago.