Passage: Sirhan Sirhan (born March 19, 1944) is a Palestinian Arab with Jordanian citizenship, born in Jerusalem, who held strongly anti-Zionist beliefs. A diary was found during a search of his home, and he wrote on May 19: "My determination to eliminate RFK is becoming more and more of an unshakable obsession. RFK must die. RFK must be killed. Robert F. Kennedy must be assassinated.... Robert F. Kennedy must be assassinated before 5 June 68." It has been suggested that the date of the assassination is significant because it was the first anniversary of the start of the Six-Day War between Israel and its Arab neighbors. When Sirhan was booked by police, they found a newspaper article in his pocket that discussed Kennedy's support for Israel; Sirhan testified at his trial that he began to hate Kennedy after learning of this support. In 1989, he told David Frost in prison: "My only connection with Robert Kennedy was his sole support of Israel and his deliberate attempt to send those 50 bombers to Israel to obviously do harm to the Palestinians". Some scholars view the assassination as one of the first major incidents of political violence in the United States stemming from the Arab–Israeli conflict in the Middle East.The interpretation that Sirhan was motivated by Middle Eastern politics has been criticized as an oversimplification which ignores his psychological problems. Sirhan's lawyers attempted to use a defense of diminished responsibility during the trial, while Sirhan himself tried to confess to the crime and change his plea to guilty on several occasions. He testified that he had killed Kennedy "with 20 years of malice aforethought". The judge did not accept this confession and it was later withdrawn.Sirhan was convicted of the murder of Robert Kennedy on April 17, 1969, and was sentenced six days later, to death. In 1972, the sentence was commuted to life in prison with the possibility of parole after the California Supreme Court invalidated all pending death sentences that were imposed prior to 1972, due to...

Question: What kind of object did law enforcement find on the shooter's person?
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