Prosecutors say an Aurora man bit a sheriff’s deputy and assaulted two federal immigration agents who were trying to detain him during a violent confrontation inside the Kane County Sheriff’s Office lobby in St. Charles earlier this month.
Francisco Javier Acevedo-Caldera, 39, is charged in a federal complaint with three counts of forcibly assaulting law enforcement officers during the execution of an arrest warrant on July 17. He remains detained in federal custody.
According to the complaint, Acevedo-Caldera had just been released from the Kane County Jail when two U.S. Immigration and Customs Enforcement Enforcement and Removal Operations officers approached him in the sheriff’s department lobby. After confirming his identity, they informed him that he was under arrest on a federal warrant and attempted to detain him.

Acevedo-Caldera initially asked to make a phone call, saying he didn’t want his family to see him arrested. Prosecutors say he was allowed the call but then began shouting profanities, clenching his fist, and threatening to “knock out” one of the officers.
When a Kane County sheriff’s deputy intervened, Acevedo-Caldera allegedly bit the deputy’s hand. He also allegedly kicked one ICE officer and headbutted the other, leaving the officer with a visible bruise. Surveillance video captured the confrontation, according to the complaint.
If convicted, two of the assault counts carry a maximum sentence of 20 years in federal prison each, while the third count is punishable by up to eight years.
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