He accompanied Gustav III at the 1792 maskerade ball where he was shot and mortally injured, and it was von Essen who immediately ordered the doors to the ball room to be locked, in order not to let the assassin get away.
He accompanied Gustav III at the 1792 maskerade ball at the Royal Opera House in Stockholm on March 16,1792 where the king was shot and mortally injured. Hans Henrik von Essen was credited with immediately ordered the doors to the ball room to be locked, in order not to let the assassin get away.