CHICAGO — A Schaumburg man has been arrested on charges of doxing and threatening an FBI agent whose information was stolen from a government vehicle during a protest over an immigration-related shooting in Minneapolis last month.

Jose Alberto Ramirez, 28, was arrested Thursday in Schaumburg on a criminal complaint filed in U.S. District Court in Minneapolis charging him with transmitting a threat to harm another, court records show.

Ramirez is scheduled to appear for a detention hearing at the Dirksen U.S. Courthouse on Tuesday to determine if he’ll be brought to Minnesota in custody. His court-appointed lawyer for those proceedings declined to comment.

The investigation stemmed from the Jan. 14 shooting of an immigrant by an Immigration and Customs Enforcement agent during a targeted arrest in Minneapolis, according to the complaint.

The shooting, which took place a week after a Border Patrol agent fatally shot U.S. citizen Renee Good, sparked a large and tense protest where FBI agents gathering evidence at the scene “were forced to evacuate the area on foot for their personal safety,” the complaint stated.

The agents left behind two government-owned vehicles, which were vandalized and ransacked of materials inside, including a rifle, a handgun, tactical vests, FBI identification, building access badges, and “rosters with employees’ phone numbers, email addresses, and home addresses,” the complaint stated.

Within a day, agents whose information was contained in the documents were bombarded with threatening and disturbing phone calls, emails and social media messages, some targeting their children or other relatives. Others were subjected to “suspicious drive-bys” at the residences, according to the complaint.

One FBI agent, identified in the complaint as Victim A, received text messages, emails and voicemails from 23 different senders to the agent’s work cellphone, including several that were later linked to a phone number used by Ramirez, the complaint alleged.

“I know where your mom lives bro. And your dad. And your kids buddy,” one text from Jan. 15 linked to Ramirez’s phone stated, according to the complaint. “Get home safe and fast.”

That same day, someone called Victim A from the Ramirez-linked phone and left a seven-second voicemail calling the agent a “bitch ass (expletive)” and saying “your day will come, (expletive),” the complaint stated.

“The threatening communications have had a significant impact on Victim A’s personal and professional life,” the complaint stated, saying the agent is afraid for their family’s safety and “has had to take significant security precautions” at work and at home.

According to the complaint, a search of law enforcement records showed Ramirez’s phone was listed in a 2014 Schaumburg police report of a harassment complaint filed by a manager at the Woodfield Mall.

The report noted Ramirez had been fired for “threatening to shoot another employee,” and that he was “sending threatening messages that he would be returning to the workplace despite being fired,” the complaint stated. No criminal charges were filed as a result of that investigation.

Meanwhile, law enforcement traced Ramirez’s cellphone billing records to a large apartment building in the 1300 block of Valley Lake Drive in Schaumburg, where he was apparently living under an alias, the complaint stated.

Ramirez has a criminal history that includes misdemeanor domestic battery, felony burglary, and mob action, the complaint stated.

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