Claim: William McKinley died by assassination.
Evidence: William McKinley Jr. -LRB- January 29 , 1843 -- September 14 , 1901 -RRB- was an American politician and lawyer who served as the 25th President of the United States from March 4 , 1897 until his assassination in September 1901 , six months into his second term.
McKinley died eight days later on September 14 of gangrene caused by the gunshot wounds.