CHICAGO (WLS) -- A Chicago law firm announced a wrongful death lawsuit Thursday in the shooting of Chicago police Officer Krystal Rivera earlier this year.

Rivera was killed in a friendly fire incident on June 5. She was shot by her partner, Officer Carlos Baker.

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Lawyers shared more details surrounding the Cook County case Thursday.

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ABC7 Chicago obtained Rivera's autopsy records , which showed she was shot from behind.

Police say Rivera's partner accidentally shot her, as they were chasing a suspect in Chatham.

Attorneys on Thursday alleged Rivera and Baker were previously in a relationship before the shooting

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