Kerri Aherne faces charges including attempted murder and assault after allegedly stabbing a mother multiple times in a Macy's bathroom in New York City.The unprovoked attack occurred while the 38-year-old victim, an employee of the Los Angeles County Sheriff's Department, was changing her 10-month-old daughter's diaper.The victim and her husband managed to restrain Aherne until police arrived, and she is now recovering in stable condition at Bellevue Hospital.