SIOUX FALLS, S.D. (KELO) — Some are mysterious disappearances; others are unsolved murders.

The one thing every cold case has in common is that a single tip, clue or piece of evidence could solve the case and bring local families closure.

In an hour-long special, we take a closer look at more than a dozen cold cases in KELOLAND.

Those are just some of the cases we have highlighted on our Cold Cases page online.

Watch the special at 8 p.m. Central on Monday, June 21 on KELO-TV and