Complex sentence: The FBI called the family of Dr. El Ghanem, who live in the United States, before they departed for Geneva on a 2007 attempt to visit him in Geneva; this indicating FBI surveillance of his U.S.-based relatives.
Split into simpler sentences: The FBI called the family of Dr. El Ghanem, who live in the United States, before they departed for Geneva to visit him in 2007. This indicating FBI surveillance of his U.S.-based relatives.