When a sinister tragedy strikes in a community, those affected often need to believe that justice will prevail.
But sometimes, cases involving unspeakable crimes against innocent victims go cold. They leave families and loved ones with nothing but questions and haunt the investigators tasked with finding those responsible.
Months, years and sometimes even decades can pass before new evidence or information comes to light, but when it does and a person is finally held accountable for the crimes they committed, the families, communities and law enforcement touched by their crimes can finally begin to heal.
Here is a look at some of cold cases that were solved after years of investigation.