DeAllen Davonta Price had been in a relationship with Ashton, police said.
One of the men charged told authorities he met two of the victims over Grindr and had a sexual relationship with them.
The attacker yelled slurs at the woman and kicked her beside a fencepost.
Police officers in riot gear burst into a bookstore and charged individuals with a law widely viewed as unconstitutional.
Ashton is at least the 31st trans, nonbinary, or gender-nonconforming person to have died by violence in the U.S. this year.
Family members of Buck's alleged victims were exposed to horrifying videos, pictures, and text messages.