NY Times article, 2014 shows the connection between the apprehension of William and Roberto Isaias, from Ecuador and the Ecuadorian Embassy previously holding Julian Assange in London.
“The tug of war over the Isaias brothers, sentenced in an embezzlement case, is part of a broader battle between Ecuador and the White House over international fugitives, including two other men the Obama administration would like to get its hands on: Julian Assange, the founder of WikiLeaks, and Edward J. Snowden, the former intelligence contractor.”
https://www.nytimes.com/2014/03/12/world/americas/wanted-by-ecuador-2-brothers-make-mark-in-us-campaigns.html