Report: Letter Sent To White House Contained Spit, Not Cyanide

Uniformed Secret Service agents patrol the top of the White House as seen from the South Lawn of the White House in Washington, Tuesday, March 17, 2015. According to the Secret Service a letter sent to the White Hous... Uniformed Secret Service agents patrol the top of the White House as seen from the South Lawn of the White House in Washington, Tuesday, March 17, 2015. According to the Secret Service a letter sent to the White House tentatively tested positive for cyanide. The letter was received at an off-site mail screening facility on March 16 and additional testing Tuesday returned a "presumptive positive" for cyanide. (AP Photo/Jacquelyn Martin) MORE LESS
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A letter sent to the White House on Monday actually contained saliva, after a test suggested that it might have contained cyanide, according to ABC News.

The White House said on Monday that it was sent a letter that contained a suspicious substance. The substance was tested and came back negative for toxins but a second round of tests suggested that the liquid could have been cyanide, spurring yet another round of testing.

The third round concluded that the substance contained a few trace amounts of cyanide, according to ABC News, but was mostly saliva.

ABC News said that the person who sent the letter is believed to be a homeless man in or around Chicago who smokes often which would produce the small amounts of cyanide.

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