The 16-year-old girl, identified only as "Liz," was attacked and raped repeatedly by an unreported number of men as she returned home from her grandfather's funeral in Busia, the BBC reported.
She was then tossed into a latrine pit where her back was broken. She is now in a wheelchair.
When Liz recovered, she identified her attackers to police, who ordered the men to cut grass around a police station in Busia as punishment, the BBC said.
The punishment sparked criticism by journalists and activists, who set up an online petition calling for the arrest of the men, on the Avaaz petition-hosting website.
"The men that raped Liz must be arrested and the police officers who let them walk free must be held to account -- this case has to be the moment when the culture of violence and impunity ends," said a statement from Avaaz.