r/masskillers is a subreddit with 233k 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, on this day…, discussion / question , in memoriam, 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
: "Unfolding: Four men arrested after “major incident” at RAF Fairford in England, an apparent foiled attack involving explosives."
15 posts
#2
ON THIS DAY…
: "Four years ago, Artyom Kazantsev killed 18 people, including 11 children, at School No. 88 in Izhevsk"
12 posts
#3
Discussion / Question
: "Channel owner of “Mass attack media” committing suicide"
11 posts
#4
IN MEMORIAM
: "On March 6th, 1999, Richard Fielding would commit one of London’s worst massacres by killing 4 generations of the Day family."
5 posts
#5
FOIA
: "Today marks eighteen years since the shooting in Kauhajoki. Here is a previously unseen image of Matti Saari imitating Jokela High School shooter Pekka-Eric Auvinen. On September 23, 2008, Saari shot and killed ten people and himself at the Kauhajoki School of Hospitality."
2 posts
#6
WARNING: GRAPHIC
: "CCTV of the 2026 Sivkerek school shooting"
2 posts
#7
BREAKING
: "Another photo of two of the vans involved in the "major incident" police operation near RAF Fairford in England"
1 post
#8
PLOTTED Mass Murder
: "NBI takes minor into custody over SoCot school shooting"
1 post
Member Growth in r/masskillers
Yearly
+24k members(11.3%)
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Last updated: October 1, 2026