Answer: It was Sirhan Bishara Sirhan who assassinated Robert F. Kennedy on June 5, 1968.
Explanation: Robert F. Kennedy, who was a member of the Democratic Party, was the U.S Senator from New York when he was assassinated by Sirhan Bishara Sirhan in June 1968. Sirhan, who was born in Jerusalem in Mandatory Palestine, claimed that he shot Kennedy because the Senator had the intention to harm Palestinians. Although the criminal was first condemned to death penalty, he was finally sentenced to life imprisonment.