At a bridge where the first two attackers were suppose to strike, nothing happened. When the third assassin threw his bomb at the archduke, seated in a second of six vehicles motorcade, it bounces of his car and exploded under a fourth car, wounding Count Boos-Waldeck,
Princip, a gaunt Bosnian Serb, Slav nationalist, was standing at the next bridge. He heard the bomb blast and assumed that the attack had succeeded. He was caught unprepared when the procession sped past him him to the town hall, with the archduke alive and well.
Princip wandered off to Moritz Schiller’s Delicatessen, located on the corner where Appel Quuay meets the Latin Bridge.
At the town hall, the archduke complained angrily. "Mr. Mayor, I came here on a visit, and I get bombs thrown at me," he declared. "It is outrageous."
But the police assured him that they had everything under control.
“While they were in the city hall following the bomb attack, Lt. Gen. Oskar Potiorek… who was also responsible for the archduke’s security, said that he considered another attack unlikely. Dr. Gerde, the commissioner of police, agreed with him,” said Lyon.
A request for two companies of soldiers to line the streets and evacuate the parade route was rejected because of the dirty uniforms, Lyon said.
The only added security precaution was to change the return route of the imperial procession. But the bungling police forgot to tell the chauffeur of the lead car about the change, so he made a wrong turn at the bridge into a narrow Franz Joseph alley, then had to stop and back out.
“It was a case of dumb luck,” said Lyon.
That maneuver forced the archduke's car to a halt, right where Princip happened to be standing.
"I got hold of my handgun and aimed it at the car without really looking," Princip later testified. "I even looked away when I fired.”
One shot hit the archduke in the jugular vein in the neck, the other struck the archduchess in the abdomen. "For God's sake, what has happened to you?" the archduchess cried out to her stricken husband. He screamed, although gravely wounded, “Sophie, Sophie! Don’t die. Live for my children!"
Princip swallowed his cyanide pill, but it made him vomit, he was not harmed and an angry mob took his pistol from him.
Princip was convicted of murder, but could not execute him because he was a minor. Sentenced to 20 years, he died of tuberculosis in prison in 1918.
"Each and every one of them said at the trial, and later said during their imprisonment, that had they known that such a horrendous war would ensue, they would never have taken part in the activities of June 28," Lyon said.