Despite coming from a typical healthy family, Robin Westman's horrific decision to shoot up a Minneapolis church full of children was inspired by online terror groups who exploit young people.

I actually met the Roblox hacker behind the Spy Bots. In this rare inside look, I reveal their side of the story, how the hacks started, and what it means for Roblox players everywhere.

Roblox is facing a federal lawsuit from the guardian of a 12-year-old New York girl who says the gaming giant put profits ...