So naturally they start by talking to a bunch of 20 somethings on Dicord who play games. They have contacted way more than 20 according to patel because they want to make sure the shooter didn't act as part of a plan and because there's a network of leftists inciting violence like this and they are going to root it out and take it down.
So as Glenn Kirschner said, they have a narrative, they want these kids to support that narrative. So they all better get lawyers cause the DOJ is either going to accuse them, or they're going to start accusing each other to get the DOJ off their backs, because the DOJ wants them to say this is a thing there's lots of Tyler Robinsons out there on Discord etc