The account in the Strib says the homeowner (shooter, victim) spoke no English.
In this account....http://wcco.com/crime/shots.fired.officers.2.611952.html the homeowner has lived in this country for 20 years.....Hmmmmmmm
My Grandfather came to America as a youth and learned to speak English without an accent and only spoke English in his home so my mother only new his original language minimally....his sister a few years older never ever learned the language.
Go figure, but dont assume that being here 20 years is a guarantee of language proficiency.