In 1987 Sultan's brother Abdulaziz staged a coup while Sultan was abroad. Huge state debt was stated as the reason. Then-UAE President Zayed vehemently denounced the coup, and a deal was reached for Sultan to be restored, while Abdulaziz would become the Deputy Ruler. Sultan, however, dismissed Abdulaziz quite quickly. In 1999, the Crown Prince (Sultan's eldest son) died while on vacation in their palace in England. Sultan made the decision to testify in front of a UK court. The new Crown Prince was appointed from a remote branch of the family.