Some of the remains are corpses - some are only bones, skeletons.
In many cases, it's clear the people were murdered, but without knowing their identities their killers cannot be held accountable.
Their murderers walk among us because their victims remain nameless.
Eyewitness News investigative reporter Kristin Thorne works with the forensic anthropology team at the New York City Medical Examiner's Office to try to help identify the remains of a teenager who was stabbed to death, a woman who was buried in concrete, and others.
If you recognize any of the individuals featured in this story, call 212-447-2030.
If you are missing a loved one, you should register them in the National Missing and Unidentified Persons System. You can also look up a missing loved one there.
ALSO VIEW | Earlier episodes of "Missing" with Kristin Thorne
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Kristin Thorne | Writer, Producer, Eyewitness News Investigative Reporter
Emily Hartmann | Senior Digital Producer, Videographer, Editor
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WABC Television New York, LLC | 2023