What is the fine-grained topic of the following text: Last month Dajerria Becton and her legal guardian, Shashona Becton, filed a $5 million lawsuit in federal court against the city, the McKinney Police Department and former Corporal Eric Casebolt regarding an incident in 2015 in which Casebolt slammed Becton, then 15, to the ground at a neighborhood pool party. Only return the topic.
Dajerria Becton's lawsuit against the city, McKinney Police Department and former Corporal Eric Casebolt for a 2015 incident.