The indictment charges Teonna Brown, 18, with assault and a hate crime in the attack on Chrissy Lee Polis last month. Brown is also charged with assaulting a customer and a restaurant employee who tried to intervene.
A 14-year-old girl is also facing the same charges in juvenile court, but her name is not being released because she is a minor. The Baltimore County State's Attorney's office says both individuals are currently being detained.
A videotape of the April 18 beating posted online shows a woman being attacked repeatedly while an employee and customer try to stop her attackers. The woman then appears to have a seizure.
The attack left Polis battered and angered members of the lesbian, gay, bisexual, and transgender community, who gathered at the McDonald's one week later for a vigil calling for an end to violence.
No one else will be charged in the case, according to the State's Attorney's office.