Albert Gallegos, 21, is charged with injury to the elderly. He's also charged with aggravated assault in another case.
Court documents show that he threatened to kill his mother and her boyfriend.
Police say he randomly beat a 92-year-old black man on Broadway and Brockton on Jan. 8.
The elderly man was reportedly beaten until he was unconscious, police say.
Court documents say Gallegos has a hatred towards black people because of his mother's boyfriend.
Police also said he attacked multiple people because of their skin color.