The Use of Deadly Force
Like everyone else who uses a gun at their job, the FBI is only allowed to use deadly force. If there is a belief that the suspect is a danger to themselves or those around them, then the FBI agents involved are allowed to make those difficult decisions. First, they go with a verbal warning. Then, they use de-escalation tactics. The absolute last step is to use deadly force. It can take takes for agents to reach that point.