Jesse Van Rootselaar, 18, created the virtual “experience” on the online gaming platform Roblox before his terrifying real-life rampage, a rep for the company confirmed.
This guide lists all of the codes for Knockout on Roblox, so you can redeem free skins, prize wheel spins and Ice.
Roblox says it has terminated the account belonging to Tumbler Ridge shooter Jesse Van Rootselaar, and deleted the game.
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