Faisal bin Abdulaziz Al Saud (14 April 1906 – 25 March 1975) was King of Saudi Arabia from 1964 to 1975. He emerged as an influential royal politician under his father King Abdulaziz and brother King Saud, serving as foreign minister of the Saudi domains for all but two years from 1930 until his death.

On 25 March 1975 King Faisal was shot point-blank and killed by his half-brother's son, Faisal bin Musaid, who had just come back from the United States. The murder occurred at a majlis (a place for sitting), an event where the king or leader opens up his residence to the citizens to enter and petition the king.

In the waiting room, Prince Faisal talked to Kuwaiti representatives who were also waiting to meet King Faisal. When the Prince went to embrace him, King Faisal leaned to kiss his nephew in accordance with Saudi custom. At that instant, Prince Faisal took out a pistol and shot him. A bodyguard hit Prince Faisal with a sheathed sword. Oil minister Zaki Yamani yelled repeatedly not to kill the prince.

King Faisal was quickly taken to a hospital. He was still alive as doctors massaged his heart and gave him a blood transfusion. Their efforts were unsuccessful, and King Faisal died shortly afterward. The nation's high religious court convicted Prince Faisal of regicide and sentenced him to execution. He was beheaded in the public square in Riyadh.

More Info: en.wikipedia.org