Conversation so far:
What were the Killian documents?
The Killian documents controversy involved six documents that are critical of President George W. Bush's service in the Texas Air National Guard in 1972–73
When were the Killian documents written?
The Killian documents controversy involved six documents that are critical of President George W. Bush's service in the Texas Air National Guard in 1972–73, allegedly typed in 1973.

Question: Were they written by Rather?
Self-contained rewrite: Were the Killian documents written by Dan Rather?