r/masskillers is a subreddit with 235k members. The community frequently discusses mass shootings, people, shooting, shootings, and killed, and they frequently recommend/review true crime youtube channels, and the most common flair used is attempted mass murder, discussion / question , on this day…, breaking, and foia.
A subreddit centered on the phenomenon of mass murder and the perpetrators who commit them, their motivations, crimes and the psychology of these individuals.
This subreddit is not meant to glorify mass killers, but rather to discuss and attempt to understand their behavior.
A mass killer is defined as one person who kills 3 or more individuals arbitrarily in a contained population at a single point in time. This includes mass shooters, bombers, terrorists, and family annihilators.
Popular Topics in r/masskillers
#1
Mass Shootings
25 posts
#2
People
21 posts
#3
Shooting
18 posts
#4
Shootings
17 posts
#5
Killed
16 posts
#6
Killings
14 posts
#7
Shooter
13 posts
#8
Man
9 posts
#9
Police
9 posts
#10
Video
8 posts
Products Discussed in r/masskillers
True Crime Youtube Channels
6 reviews
#1
Dreading
5.0★ from 2 reviews
#2
Explore With Us
4.0★ from 1 review
#3
Matt Orchard
4.0★ from 1 review
Flair Used in r/masskillers
#1
ATTEMPTED Mass Murder
: "Photos of Bradley Sayer during his childhood"
14 posts
#2
Discussion / Question
: "Photos of the today's school attacker in Bistrița, Romania"
10 posts
#3
ON THIS DAY…
: "On October 19, 2012, Melanie Smith committed one of the worst mass murders in the history of Wales, by murdering five members of the same famiy."
7 posts
#4
BREAKING
: "2 dead, multiple injured after vehicle drives through soccer game in northeast Wichita (Kansas)"
2 posts
#5
FOIA
: "Crime scene photos of the 2010 ABB Plant Shooting"
2 posts
#6
IN MEMORIAM
: "Photos of the victims of the Happy Land fire."
2 posts
#7
FAMILICIDE / Domestic Violence
: "New details on Oct 18 mass shooting in Mundelein, Illinois: Bryan Schmidt (51) shot his parents (80, 77), long-time girlfriend (37) and son (22) before taking his own life."
2 posts
#8
New Official Information
: "Bend police say 9 people were in classroom that was targeted by teen shooter"
1 post
#9
PLOTTED Mass Murder
: "2 teenagers arrested for alleged plot targeting California high school, police say"
1 post
#10
WARNING: GRAPHIC
: "Photo evidence relating to the Tehama Highway crash caused by Christina Whittemore"
1 post
Member Growth in r/masskillers
Yearly
+24k members(11.5%)
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Last updated: October 25, 2026