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21 Mass Murderers the FBI Was Warned About But Still Failed to Stop

Contributors: 3
Items: 21
# Summary Date Source
1 The 9/11 terrorists 09/11/2001 Coleen Rowley (former FBI special agent)
2 A terrorist attempting to blow up the NYC subway system (who backed out of the attack) 09/22/2009 PJMedia
3 The "Underwear Bomber" 12/25/2009 PJMedia
4 Fort Hood terrorist, Nidal Hasan 08/28/2013 Breitbart
5 The Boston Marathon bombers 04/15/2014 NBC News
6 Three who Americans who joined ISIS in Syria 05/14/2014 NBC News
7 ISIS-inspired American who killed three in Washington, one in New Jersey 08/06/2014 Seattle Times
8 Garland, Texas terrorists 05/03/2015 CBS News
9 Serial sexual molester, Dr. Lawrence Nassar 07/15/2015 The New York Times
10 A man shouting "Allahu Akhbar" while attacking patrons at an Israeli-owned deli 02/14/2016 PJ Media
11 Pulse Nightclub terrorist, Omar Mateen 06/12/2016 Grabien
12 A Va. man shouting "Allahu Akhbar" while stabbing a couple 08/23/2016 WSLS
13 NYC bomber, Ahmad Khan Rahami 09/19/2016 The New York Times
14 Parkland mass killer, Nikolas Cruz 02/14/2018 BuzzFeed
15 Corey Johnson, who converted to Islam and killed a 13-year-old boy and stabbed a mom and her son 03/13/2018 WPEC
16 The Waffle House mass killer, Travis Reinking 04/22/2018 Grabien
17 Anthony Warner, the Nashville bomber 12/30/2020 WSMV
18 The Boulder shooter, Ahmad Al Issa 03/23/2021 The Daily Mail
19 The San Jose shooter, Samuel Cassidy [DHS previously detained him] 05/27/2021 The Wall Street Journal
20 Lyndon McLeod, Denver mass murderer, made videos about murder before killing 5 people 12/27/2021 VICE News
21 Brooklyn subway attacker, Frank R. James 04/12/2022 Newsweek
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