The United States Capitol building was under violent seige while Congress was gathered to perform the peaceful and constitutional transfer of American presidential power. Outside, overwhelmed Capitol cops were physically battling the attackers, and many of those cops would sustain serious and even permanent injury.
On the other side of the door in a small corridor in front of a small group of badly outnumbered officers was a violent mob pushing on the doors, breaking the windows, screaming, and trying to get in. If one gets through, that could open the floodgates.
What was the biggest danger in that small corridor? Directly behind the officers were the doors to the congressional chambers, where elected American representatives were huddled, calling their families, trapped in the building and fearing for their lives.
Amid the chaos, one of the violent protestors in front of the officers broke through a window and started climbing through. The attacker was ordered to stop and did not. An officer, with all of the above as context, fired.
Those are the facts. That is the context. This other noise is nothing more than standard anti-American, delusional, mal-informed MAGA cult fantasy and denial.
Who is responsible for her death? She is. Next is the person whose historically destructive lie about a rigged election placed her, in a manipulated rage, at the Capitol that day.