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Shannon McNease is accused of attempting to murder her infant daughter

McNease's 8-week-old infant was hospitalized with 20 rib fractures

McNease allegedly wrote Facebook messages that revealed "homicidal intent"

A Washington mother was charged with attempted murder after authorities allege she tried to kill her 8-week-old infant, who suffered 20 rib fractures.

Shannon McNease is charged with attempted murder and assault of a child, according to Kitsap County, Wash., jail records.

The Bremerton Police Department said in a release that McNease's daughter was taken to the hospital by her father on Aug. 7. The infant was "suffering from a brain bleed and multiple fractures in various stages of healing, indicating non-accidental trauma," police said.

In addition to 20 rib f

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