In late May, Chicago Police officer Krystal Rivera ended an off-and-on romantic relationship with her partner, fellow officer Carlos Baker, according to her family and attorneys.
Police Officer Krystal Rivera was shot and killed during an armed confrontation in a Chatham apartment on June 5, 2025. (Chicago Police Department)
Just days later, Baker shot and killed her while the two tactical officers tried to arrest a weapons suspect on the South Side. Rivera, 36, was the first CPD officer to die in a friendly fire incident in nearly 40 years.
Rivera’s family on Thursday filed a nine-count lawsuit against Baker, the city and Chicago Police Department, alleging willful and wanton conduct, negligence and intentional infliction of emotional distress.
“Every day is painful as we continue to grieve the loss of my daughter, Krystal,” Rivera’s mother, Yolanda Rivera, said at a press conference Thursday. “Her child, her sisters, our family, (and) an entire community miss her deeply.
“From this moment forward, my purpose is simple: that those responsible for her death must be held accountable.”
Attorneys for Rivera’s family said Baker was profoundly unfit to be a police officer, as demonstrated by the 11 misconduct complaints in which he was a subject in the years before he shot and killed Rivera. In the moments after the June 5 shooting, Baker did not call a dispatcher for help, nor did he attempt first aid on Rivera, her family’s attorneys said. Instead, he ran from the scene.
“He never should have been a Chicago Police officer. He never should have got past his probationary period. He was not fit to police our communities, let alone carry a gun under the color of law,” attorney Antonio Romanucci said Thursday.
“Against all decency, her partner not only shot her, but ran in an opposite direction and left her to die,” Romanucci added.
Representatives for the city and CPD declined to comment on the pending litigation. Baker did not immediately respond to a request for comment.
Rivera, a four-year CPD veteran with a young daughter, was killed after the Gresham (6th) District tactical team she was part of tried to check on a report of an individual with a weapon at about 9:50 p.m. on June 5 in the 8200 block of South Drexel Avenue.
Police search a residential building at the scene where Officer Krystal Rivera was shot near the 8200 block of South Drexel Avenue in the Chatham neighborhood on June 5, 2025, in Chicago. (Armando L. Sanchez/Chicago Tribune)
Authorities previously said that Rivera was running down a hallway when she was shot. Her fellow officers rushed her to the University of Chicago Medical Center, where she was soon pronounced dead.
Thursday, though, Romanucci said Rivera was in a tactical position, standing behind Baker, when she was shot.
Records show the Civilian Office of Police Accountability’s shooting investigation remains open.
The Cook County medical examiner’s office found Rivera was shot in her left flank from behind. The fatal shot pierced her skin near her left armpit and traveled through both her lungs, wedging itself in her ribs, autopsy records show.
“Because the lethal injury was caused by another individual who volitionally fired a weapon knowing the action could cause death,” Rivera’s autopsy report stated. “The manner is HOMICIDE.”
Though two men now face an array of weapons and narcotics charges in connection with the shooting, neither faces a count of murder in her death. The two, Adrian Rucker and Jaylin Arnold, remain held in the Cook County Jail as their cases progress. CPD bodyworn camera footage that captured the shooting also remains withheld from public view.
An officer wears a button of slain Chicago police Officer Krystal Rivera while attending her funeral at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Officers remove a Chicago flag from the casket of Chicago police Officer Krystal Rivera during her funeral at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Bella Medina, daughter of slain Chicago police Officer Krystal Rivera, is presented with the Chicago casket flag by police Superintendent Larry Snelling at the funeral for Officer Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
An officer salutes as the casket of slain Chicago police Officer Krystal Rivera leaves the Living World Christian Center at her funeral, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Police officers remove and fold the Chicago flag over the casket following the funeral for slain Chicago police Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
CPD Superintendent Larry Snelling, Mayor Brandon Johnson, and Gov. JB Pritzker attend the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Chicago police Superintendent Larry Snelling presents a flag to Yolanda Rivera, the mother of slain Chicago police Officer Krystal Rivera, during her funeral at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Yolanda Rivera attends the funeral for her daughter slain Chicago police Officer Krystal Rivera at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Police officers embrace at the funeral for slain Chicago police Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Chicago police officers escort the casket of Officer Krystal Rivera into the funeral service for her, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Chicago police Superintendent Larry Snelling presents a flag to Bella Medina, the daughter of slain Chicago police Officer Krystal Rivera, during her funeral at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Tomas Martinez, 58, waits for the procession to leave the funeral of slain Chicago police Officer Krystal Rivera at Living World Christian Center Wednesday June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Police attend the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center Wednesday June 25, 2025, in Forest Park. Rivera was unintentionally shot and killed by a fellow officer on June 5 after a confrontation with an armed suspect. (Armando L. Sanchez/Chicago Tribune)
Dystany Martinez touches the casket after delivering her remarks on slain Chicago police Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Elizabeth French, slain Officer Ella French’s mother, attends the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Chicago police Superintendent Larry Snelling walks past Officer Krystal Rivera’s casket at Rivera’s funeral service on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Police officers gather at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Police prepare for the casket of slain Chicago police Officer Krystal Rivera to be transported in a procession from her funeral at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Chicago police officers escort the casket of Officer Krystal Rivera into her funeral service, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Police salute while attending the funeral for Chicago police Officer Krystal Rivera at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Officers carry the casket of slain Chicago police Officer Krystal Rivera during her funeral at Living World Christian Center on Wednesday June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Yolanda Rivera, the mother of Chicago police officer Krystal Rivera, is escorted into the funeral for her daughter at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Friends, family, and police attend the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
The Bagpipes & Drums of the Emerald Society perform during the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Officers carry the casket of slain Chicago police Officer Krystal Rivera during her funeral at Living World Christian Center on Wednesday June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
CPD Superintendent Larry Snelling and Mayor Brandon Johnson attend the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center on Wednesday June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Chicago police cadets arrive at the funeral for slain Chicago police Officer Krystal Rivera on Wednesday, June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Chicago police officers arrive at the funeral for slain Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. Rivera was unintentionally shot by a fellow cop during a confrontation with an armed suspect on June 5. (Armando Sanchez/Chicago Tribune)
Friends, family, and police attend the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Police officers stand as they attend the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
Chicago Police Department cadets arrive at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. Rivera was unintentionally shot by a fellow cop during a confrontation with an armed suspect on June 5. (Antonio Perez/Chicago Tribune)
Mourners arrive at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Armando Sanchez/Chicago Tribune)
Mayor Brandon Johnson attends the funeral for slain Chicago police Officer Krystal Rivera at Living World Christian Center on June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
The Bagpipes & Drums of the Emerald Society arrive at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
A Chicago police officer readies motorcycles as mourners arrive at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Police officers prepare for the funeral for slain Chicago police Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. Rivera was unintentionally shot by a fellow cop during a confrontation with an armed suspect on June 5. (Armando Sanchez/Chicago Tribune)
Mourners and officers arrive at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Police officers prepare for the funeral for slain Chicago police Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. (Armando Sanchez/Chicago Tribune)
Chicago police cadets arrive at the funeral for slain Chicago police Officer Krystal Rivera, June 25, 2025, at Living Word Christian Center in Forest Park. (Armando Sanchez/Chicago Tribune)
Mourners and officers arrive at the funeral for slain Chicago police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Chicago police Superintendent Larry Snelling walks back to his seat after speaking during the funeral for slain police Officer Krystal Rivera on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
Jen Topacio speaks about her friend, Chicago police Officer Krystal Rivera, during funeral services on June 25, 2025, at Living Word Christian Center in Forest Park. (Antonio Perez/Chicago Tribune)
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An officer wears a button of slain Chicago police Officer Krystal Rivera while attending her funeral at Living World Christian Center, June 25, 2025, in Forest Park. (Armando L. Sanchez/Chicago Tribune)
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In August, the Civilian Office of Police Accountability opened an investigation after Baker allegedly battered an off-duty female CPD officer at a bar in Wicker Park. Soon after, he was stripped of his police powers after he allegedly tried to interfere with CPD’s investigation of the battery.
Maura White, another attorney for Rivera’s family, said a 2022 complaint against Baker alleged that he brandished a gun at a former romantic partner when she was on a date with another person. That investigation was “dropped” after three months.
The next year, in 2023, Rivera and Baker began their relationship, lawyers said. It would continue “on-and-off” for another two years.
In early 2025, Rivera learned that Baker was dating another woman who he was also residing with. Rivera, to that point unaware of Baker’s other relationship, told him that she planned to speak with the other woman. Baker tried to dissuade her, and Rivera ended the relationship in late May 2025, according to the court document.
On June 4, Baker “show(ed) up uninvited” at Rivera’s home after she told him to stay away. The following day, Baker fatally shot her.
Rivera’s family’s attorneys noted, too, that in the months before her death, Rivera “told her supervisors that Carlos Baker was reckless” and requested that she be reassigned with a new partner.
“CPD failed to protect Krystal,” her mother said through tears Thursday. “There were opportunities to intervene, and yet, nothing was done.
“Krystal believed in justice, and that belief is what led her to wear her badge every day. Now I ask the city of Chicago directly, where is justice for Krystal?”
The first hearing in the case is scheduled for February 2026.