Stills was charged with intimidating a participant in the legal process, a felony, as well as misdemeanor disorderly conduct and criminal trespass.
The 28-year-old National Football League player joined 86 others in a massive protest outside the home of Kentucky Attorney General Daniel Cameron to seek justice for Taylor.
Cameron, a Republican and Kentucky's first black attorney general, had asked police to remove the protesters from his property, the statement said.
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Protesters reportedly chanted the name of Breonna Taylor..
Cameron, as well as Louisville mayor Greg Fischer, have been facing constant calls to reform the police and charge the three officers with murder. If convicted, the protesters could face a prison sentence of one to five years, according to Kentucky's sentencing guidelines.
Louisville police shot and killed Taylor while serving a no-knock warrant in March. A wrongful death lawsuit filed by Taylor's mother, Tamika Palmer, says authorities found no drugs in the home.
On Tuesday afternoon, a group of protesters marched from a high school to Cameron's home, police said. One of the officers involved in the incident has been fired, but the other two remain on the force. "That is not acceptable and only serves to further division and tension within our community. The only objective these charges seem to serve is to potentially chill the free speech rights of the protesters".