r/masskillers is a subreddit with 231k 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 discussion / question , on this day…, breaking, attempted mass murder, and familicide / domestic violence.
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
Discussion / Question
: "Caleb Vazquez's Girlfriend arrested and Indicated"
22 posts
#2
ON THIS DAY…
: "On this day in 2022, 4 mass shootings occurred in the U.S. (Bend, OR; Phoenix, AZ; Detroit, MI; Houston, TX)."
13 posts
#3
BREAKING
: "Video from the scene of the school attack in Fagersta, Sweden today. Several wounded, suspect shot and wounded by the police."
7 posts
#4
ATTEMPTED Mass Murder
: "CCTV stills of Mohammad Jalani arriving to Ateneo de Zamboanga University before the shooting"
7 posts
#5
FAMILICIDE / Domestic Violence
: "Photos from the scene after a man killed multiple family members at a home in Billings, Montana yesterday before setting the house on fire and then committing suicide"
5 posts
#6
FOIA
: "CCTV stills of Robin Westman outside Annunciation Catholic Church"
5 posts
#7
New Official Information
: "Court Slashes Award Alex Jones Was Ordered to Pay Sandy Hook Parents"
4 posts
#8
WARNING: GRAPHIC
: "Leak audio from robb elementary school incident"
4 posts
#9
PLOTTED Mass Murder
: "Mugshots of now 16-year-old Lilyana Rose Wagner, who on November 19, 2024, when she was 14, planned to carry out a shooting at her former middle school. She ultimately changed her plan and killed her mother instead."
3 posts
#10
IN MEMORIAM
: "On August 4, 40-year-old Daniel Antonio Perez walked to his neighbor's house in San Antonio, Texas, and opened fire on four siblings for no apparent reason. 20-year-old Dravyn Quiroz and his 11-year-old brother Maliki Perales were killed."
2 posts
Member Growth in r/masskillers
Yearly
+23k members(11.2%)
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Last updated: September 2, 2026