Lennon's killer, Mark David Chapman, is up for parole next year.
InsideEdition.com spent a day with a New York City-based project that teaches people how to administer the overdose-reversing drug Narcan.
Katelyn Davis killed herself live online in Dec. 2016, less than a month later, 14-year-old Nakia Venant did the same.
Has 'Party Monster' Reinvented Himself? 20 Years After Manslaughter Sentence, Michael Alig Looks Forward
The former "King of the Club Kids" looks back on his life after one of New York's most notorious crimes.
Experts estimate that more than 2.5 million children in the U.S. are being raised by their grandparents or other relatives because of the opioid epidemic.