By Katie Mettler @ WashingtonPost.com, April 23

For 16 years, Mohamed Toure and Denise Cros-Toure — both descendants of politically powerful families in Guinea — lived and worked in the wealthy Dallas suburb of Southlake. The couple’s background placed them among an elite class: Toure was the son of Guinea’s first president and Cros-Toure’s father was secretary of state. In Texas, the couple promoted African businesses, organized culture festivals and were written about in newspapers for their philanthropy. Their children played sports, graduated from high school and went to college.

During that time, a girl named Djena Diallo lived alongside them. Like them, she was Guinean. She traveled to weddings, graduations and the Toure children’s sporting events. To the outside world, she appeared to be a member of the family.

But at home, according to federal prosecutors, the family dynamics were far different [....]