Eight-year-old Rocco was injured Tuesday night when police arrested a man on warrants for probation violations and failing to register as a sex offender. He died Thursday evening.
Twenty-one-year-old John Lewis Rush was one of Allegheny County's most wanted fugitives. Police say he stabbed Rocco in the back and wounded two officers before being taken into custody.
Pittsburgh Mayor William Peduto says Rocco served the city faithfully and "paid the ultimate price in the line of duty."
