Alicia Arritt spoke with NewsNation local affiliate KDVR about her former boyfriend, Matthew Livelsberger.

Investigators revealed that Matthew Livelsberger used ChatGPT to search for explosive targets, ammunition capabilities and pyrotechnic regulations.

The Las Vegas Metropolitan Police Department (LVMPD) is set to brief the public on its investigation into last week's Cybertruck explosion outside Trump International Hotel injured at least 7 people. The suspect, identified as 37-year-old Matthew Livelsberger, was found in the rented vehicle with a gunshot wound to the head. Livelsberger was an active duty...

Podcaster Shawn Ryan teased a new release days after he featured a letter allegedly written by Matthew Livelsberger on his show.

As Jon Stewart returned to The Daily Show on Monday, he had some advice for the country’s radicalized men in the wake of recent attacks. The comedian offered a “plea to all the would-be terrorists out there,” noting that Shamsud-Din Jabbar, Matthew Livelsberger and Luigi Mangione were all “normal-seeming people” who suffered “a setback in […]

Podcast host Shawn Ryan apologized after he shared an email allegedly written by Matthew Livelsberger on an episode of his show.

The GOP congresswoman said Livelsberger's alleged manifesto "changes everything" as the investigation into the explosion continues.

Two military service members, Shamsud-Din Jabbar and Matthew Livelsberger, have been named as suspects in recent horrific acts, highlighting the need for mental health checks for veterans and active-duty military members.

A podcaster and a retired U.S. Army intelligence officer have taken to social media to share more messages allegedly from Livelsberger.

Donell Harvin said that suicide was "the highest cause of death among active-duty military members" as of last year.

An FBI special agent said Livelsberger had been "struggling with PTSD and other issues" before the Las Vegas bombing.