David Bogdanov of Washington State received the maximum sentence for second-degree murder.
A Madrid man changed his story on Wednesday. However, protests organized due to the original alleged attack went on as planned.
A protest is planned for Saturday in response to this and other recent anti-LGBTQ+ crimes.
The video that shows the violent incident and students laughing at a Georgia school has been viewed more than 5 million times on Twitter.
The men hacked Bangladeshi activist Xulhaz Mannan and his friend Mahbub Rabbi Tonoy to death with machetes in 2016.
Johnson was at least the 35th trans, nonbinary, or gender-nonconforming person to die by violence in the U.S. this year.
Last year saw the highest number of overall hate crimes in the United States since 2008, according to the FBI's data.