Karl Rove will testify for the fourth time in front of a grand jury in the Valerie Plame CIA leak case. He has been warned that his testimony could be used against in a future indictment. This is the first time he has received this standard warning, which is required when a witnesses testimony could be used against themself. This could mean that another witness in the case named Rove as the source of the leak, or he may have in some way participated in the leak and could be charged.
Nola.com: NewsFlash - Rove said to testify in CIA leak case