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Shirley Gaines pleaded guilty to two counts of first-degree murder on Monday.
Gaines was convicted for beating and killing her 87-year-old mother Mae Brown.
On October 15, 2022 police were called to the Lincoln Perry senior home complex in the 3200-block of South Prairie Avenue about 3:40 p.m. after a witness said they couldn't get ahold of Brown, according to CPD.
Brown was found unresponsive in a wheelchair and was pronounced dead at the scene, police said.
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Her death was quickly ruled a homicide. The Cook County Medical Examiner's Office said Brown's body had multiple injuries.
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On Monday, Gaines was sentenced to 20 years, in which she must serve 100% of the sentence.
During Gaines trial, prosecutors said the two had argued over money days before the killing.
The video in the player above is from a previous report.