2's company, 3's a crowd, 4's an invitation to die

Articles currently on the Washington Post's AP wirefeed:

Four Bodies Found at Ind. Home; Man Held
Four Men Killed in Boston Shooting
Four People Killed in Ariz. Trailer Fire
Four People Shot Dead in Northern N.J.

numerology
noun
The study of the occult meanings of numbers and their supposed influence on human life.
[Latin numerus, number; see number + –LOGY.]
"numerology." The American Heritage® Dictionary of the English Language, Fourth Edition. Houghton Mifflin Company, 2004. Answers.com 14 Dec. 2005. http://www.answers.com/topic/numerology