Stevens returned to the United States in March 1908 to visit his family in Washington, D.C. and vacation with his sisters at a cottage they owned in
Atlantic City, New Jersey. Upon his arrival, he gave an interview with a San Francisco newspaper in which he stated that the common people of Korea welcomed the increasing Japanese presence in their country. These statements provoked the ire of two local associations of Koreans, the
Daedong Bogukhoe and the
Gongnip Hyeophoe, who held a joint meeting in which they agreed that something had to be done about Stevens. On
March 22, 1908, four Korean men chosen by the associations accosted Stevens at the
Fairmont Hotel, where he was staying. Their leader, a man by the name of Earl Lee who was described as fluent in English, asked him if he had indeed made the statements attributed to him in the newspaper, and whether "Japanese were not killing off the Koreans". When he answered yes to the first question and no to the second, the four men began to strike Stevens with chairs, knocking him down and causing him to strike his head against the marble flooring; Stevens backed up against the wall until help arrived. After the assault, Lee was quoted as saying, "We are all very sorry that we did not do more to him."
The following day,
Jang In-hwan and
Jeon Myeong-un, both
Korean immigrants to the United States, approached Stevens at the
Port of San Francisco as he prepared catch a ferry to make a rail connection in
Oakland and attacked him. Jeon fired his
revolver at Stevens first, but missed, and instead rushed at him, using his weapon
as a club to hit Stevens in the face. Jang then fired into the melee, striking Stevens twice in the back; Jeon was also shot in the confusion. The crowd which had gathered urged that they be
lynched on the spot; Jang was arrested and held without bail on a charge of murder, while Jeon was first hospitalized, and later charged as an
accessory. In newspaper interviews after the attack, both Jeon and Jang offered no apology for the assassination, describing Stevens as a "traitor to Korea" and stating that "thousands of people have been killed through his plans".
One bullet had penetrated Stevens' lung, while another lodged in his groin; however, surgeons at the St. Francis Hospital initially expected that he would be able to make a recovery, and on the day of the attack he was apparently in good enough health to issue a statement to the press that the assault was "evidently the work of a small band of student agitators in and about San Francisco, who resent the fact that the Japanese have a protectorate over Korea and believe that I am to some extent responsible for this condition of affairs in their country". However, his condition began to deteriorate on the morning of
October 25. His doctors, seeing signs of inflammation in his wounds, placed him under anaesthesia and began to perform surgery at six that evening. He never regained consciousness after that, and died shortly after 11 PM, with Japanese Consul
Chozo Koike at his bedside. He was buried in his hometown of Washington, D.C. after a funeral service at
St. John's Episcopal Church; Secretary of State Elihu Root was among his
pallbearers.
News of Stevens' assassination was greeted with sorrow in diplomatic circles in Japan and among American missionaries in Korea, to whom Stevens was well-known; United States Ambassador to Japan
Thomas O'Brien was quoted as saying that "the utmost grief is expressed by everyone", adding that he counted Stevens as a "true and useful friend".
Yale University professor
George Trumbull Ladd, in a
letter to the editor of
The New York Times, denounced the attacks as "cowardly and shockingly brutal", calling Koreans a "bloody race" and, comparing the Stevens case to a number of other assaults in Korea, such as that against American missionary
George Heber Jones, concluded that politically-motivated murders were not "an isolated or at all peculiar experience" in Korea, and stated that the events "furnish an instructive object lesson for the correct estimation of the Korean character and the Korean method of self-government".