This is according to FoxNews.com:
An anonymous user operating a computer traced to Stamford, Conn.  home to World Wrestling Entertainment  posted an entry to pro wrestler Chris Benoit’s biography on Wikipedia.org announcing the death of his wife Nancy at least 13 hours before police in suburban Atlanta said they found her body along with her husband’s and that of their 7-year-old son, FOXNews.com has learned.
Read the full story here: Web Time Stamps Indicate Nancy Benoit’s Death Reported on Web at Least 13 Hours Before Police Found Bodies in Her Home
The wikipedia page can be found here and Wikinews has verified the story here.
