Montgomery became the first female federal prisoner executed in 67 years, the first woman executed in the United States since Kelly Gissendaner in 2015, and the first person executed in the United States in 2021. Only three other women have been executed by the U.S. federal government: Mary Surratt, by hanging in 1865; Ethel Rosenberg by electric chair in 1953; and Bonnie Heady by gas chamber, also in 1953. Montgomery's execution was followed a day later by Corey Johnson, and three days later by Dustin Higgs. They were the last three executions under the presidency of Donald Trump, occurring in a lame-duck period. All three were carried out by the United States federal government, each being controversial for a variety of reasons.
