CHICAGO (WLS) -- The Chicago police officer who investigators say accidentally shot and killed his partner Officer Krystal Rivera earlier this year is now under investigation for allegedly attacking an off-duty female officer, a police report shows.

According to a police report filed in Sunday night's alleged bar attack in Wicker Park, a female officer told investigators she was with friends and the offender had no idea she was a Chicago police officer.

She told investigators her offender is an off-duty police officer, identified in the police report as the very same officer who shot and killed his police partner, Rivera, on a call earlier this summer.

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According to the police report obtained by the ABC7 I-Team, the woman told p

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