Missing College Sophomore Saniyya Dennis, 19, Believed to Have Died by Suicide, District Attorney Says

Where Is Saniyya Dennis? Search Is on for Buffalo State College Student Missing for More Than a Week

Prosecutors Say Kristin Smart Was Likely Killed During Attempted Rape

Possible Sighting in Mysterious Case of Jackson Alexander Miller, Man Who Vanished as a Teen

Podcaster Credited With Cracking Open Kristin Smart Case, Police Say

Body of Missing LSU Student Kori Gauthier Found in Mississippi River 

Paul Flores, Longtime Person of Interest in 1996 Kristin Smart Disappearance, Arrested for Murder

Prayer Vigil Held for California Mother Maya Millete, Who’s Been Missing Since January

Maya Millete Case: Loud Bangs Heard on Neighbor's Surveillance Cam on Night California Mom Went Missing

Interior Secretary Deb Haaland Launches Unit to Investigate Missing and Murdered Native Americans

Jonelle Matthews Case: Man Charged in 1984 Murder Put His Own Name on Person of Interest List, Prosecutors Say

What Happened to Sinead Lyons? Woman Vanishes While Walking Her Dog in New Hampshire

Search for Kristen Smart's Body Continues With Help From Cadaver Dogs, Police Say

What Happened to Michelle Arnold-Boesiger? Missing Illinois Woman Found Dead Inside U-Haul Storage Unit

Case of Oklahoma Teen, Found After Going Missing, Puts Spotlight Back on Missing Mom, Who Vanished 5 Years Ago

Missing Colorado Hiker Josh Hall's Dog Found Alive, Bringing a Sign of Hope to Family

Body in Suitcase Found Near North Carolina River Not Far From Where Pregnant Woman Went Missing, Police Say

Workers Inspecting of Sacramento Storm Drain Discover Skeleton, Beginning Multi-Agency Effort to Solve Mystery

Who Killed JonBenet Ramsey? ‘20/20’ Special Probes Little Girl's Killing

Mystery as Florida Man Found Dead and Search for His 'Endangered' Missing Girlfriend Continues, Police Say

5-Year-Old Missing Oregon Boy Is Saved After Barking Dog Alerts Police to His Whereabouts