This is a really strange story and its been picked up by FOX News as well as the Wikipedia news outlet .. Apparently, Chris Benoit's Wikipedia page was updated with information regarding Nancy and Daniel's murders 14 hours before the Atlanta police ever entered Benoit's home to discover the crime scene.

From Wikipedia:

Wikinews has learned through an investigation that anonymous edits on the Wikipedia article Chris Benoit were added about the death of his wife Nancy Benoit 14 hours before police entered the Benoit home to find the former professional World Wrestling Entertainment (WWE) Canadian wrestler and his family dead.

From FOX News:

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. Employees at Wikipedia.org said the posting went live on their site on Monday at 12:01 a.m. Eastern Standard Time. Police, however, said they found the bodies Monday at 2:30 p.m. EDT.
source: sescoops.com