Kirk's security team was in on it
Rumor Contested TPUSA / insider
Owens has pointed at Kirk's own security as a possible inside group. Harpole's public account is the opposite: he says he asked for roof coverage and did not get it.
Inside-job claims need a named actor, a communication, or a physical act. A failed overwatch is the commonest explanation for an open roof. Grade this rumor until someone produces a security-staff act that looks like facilitation.