It seems to me that the FBI Wanted Poster makes that perfectly clear:
"Yaser Abdel Said is wanted for murder. On January 1, 2008, Said took his two teenaged daughters for a ride in his taxi cab, under the guise of taking them to get something to eat. He drove them to a secluded park in Irving, Texas, where he allegedly shot both girls to death. They died of multiple gunshot wounds. The 17- and 18-year-old girls were dating American boys, which was contrary to their father's rules of not dating non-Muslim boys."
The only thing that has change is that such a killing is no longer being labelled an "Honor" killing.
That cowardly murder has no "Honor".
Of course he doesn't. But the term "Honor Killing" is a colloquialism and the meaning is understood by a vast number of people.
I just want Islam to be exposed for what it is.