Incident Summary:

05/19/2017: An assailant, identified as Devon Arthurs, shot and killed Jeremy Himmelman and Andrew Oneschuk at their shared apartment in Tampa, Florida, United States. This was one of two attacks by Arthurs on the same day. Arthurs claimed responsibility for the attack and stated that he had targeted Himmelman and Oneschuk, who were two of his roommates as well as alleged neo-Nazis and fellow members of the Atomwaffen Division, because they planned to carry out terrorist attacks that he wanted to prevent. Arthurs also claimed that his roommates had "disrespected" his conversion to Islam in the year prior to the attack, and that he was frustrated about global anti-Muslim sentiment and United States airstrikes in the Muslim world. A judge initially ruled that Arthurs was incompetent to stand trial due to mental illness. As of August 2019 the status of Arthurs' competency for trial was under review, but unresolved.



United States

North America

region/u.s. state:



Attack Information
Type of Attack (more) Armed Assault
Successful Attack? (more) Yes
Target Information (more)
Target Type: Private Citizens & Property
Name of Entity Not Applicable
Specific Description Civilians: Jeremy Himmelman, Andrew Oneschuk
Nationality of Target United States
Additional Information
Hostages No
Ransom No
Property Damage No
Weapon Information
Type Sub-type
Firearms Rifle/Shotgun (non-automatic)
Weapon Details
A rifle was used in the attack.
Additional Information
Suicide Attack?No
Part of Multiple Incident?Yes
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Doubt Terrorism Proper (more) No
Additional Information Arthurs claimed that the victims, along with another roommate Brandon Russell, had been planning to carry out terrorist attacks motivated by their neo-Nazi and white supremacist beliefs.
Perpetrator Group Information
Group Name Claimed Responsibility
Unknown Yes (Confirmed: Unknown; Mode: Personal claim)
Perpetrator Statistics
Number of Perpetrators 1
Number of Captured Perpetrators 1
Casualty Information
Total Number of Casualties 2 Fatalities / 0 Injured
Total Number of Fatalities 2
Number of U.S. Fatalities 2
Number of Perpetrator Fatalities 0
Total Number of Injured 0
Number of U.S. Injured 0
Number of Perpetrators Injured 0
"'Neo-Nazi' aimed to hit Turkey Point nuclear plant, Tampa murder suspect tells police," Miami Herald, June 14, 2017.
"How an 18-year-old gamer went from neo-Nazi to Muslim to alleged killer," VICE News, May 25, 2017.
"Police: Florida suspect killed neo-Nazi roommates to stop terrorism," UPI, May 23, 2017.