Jahn’s astonishing gaming habit — more than 17,000 hours on Steam in total — was revealed in a Substack piece by ...

That amounts to nearly 15% of his entire life — including sleeping hours — on the video game platform Steam over the course ...

Dallas shooter Joshua Jahn’s gamer pals made ghoulish jokes about his attack on an ICE facility where he killed one person ...

Investigators say the gunman planned the rooftop attack in detail, leaving writings about targeting ICE agents and searching online for ways to track them.

The shooting suspect was identified as 29-year-old Joshua Jahn, multiple law enforcement sources told ABC News.