Pring-Wilson will be arraigned Monday morning at 9 a.m. at Cambridge District Court.
On Saturday afternoon, police were questioning residents in the area of the stabbing.
—Hera A. Abbasi contributed to the reporting of this story.
—Material from the Associated Press was used in the reporting of this story.
—Staff writer Hana R. Alberts can be reached at alberts@fas.harvard.edu.
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