Guatemalan asylum seeker Otilia Asig-Putul, who lives in Miami, filed a complaint Tuesday on behalf of her 11-year-old son, who was separated from her at the U.S. border near San Luis, Arizona, on May 9, under the the Trump Administration’s “Zero Tolerance” immigration policy.

Asig-Putul’s suit in federal court names defendant Heartland Human Care Services Inc., a Chicago detention center also known as Heartland Alliance. It claims her son, a minor referred to as WA in the complaint, was bullied and assaulted by another child at Heartland.