There is a pattern developing here. All the people around these domestic terrorists immediately appear to cooperate with law enforcement. Is this a strategy to protect the terror cells?
Certainly could be, but with Antifa, the street level goons are recruited from the homeless, drug addicted, common criminals, people with mental illness, the isolated, and a smattering of naive young people. The people one level up, the ones who do the recruitiing and training don't get popped by le, because they're not the ones committing the crimes.
If something similar is happening with these deranged shooters, it's entirely possible that the family members are just not aware of the mental state of someone like this.
That doesn't go for the boyfriend of Charlie Kirk's murderer, who was totally in on it IHMO.