Federal prosecutors have accepted an offer from presidential adviser Karl Rove to give 11th-hour testimony in the case of a CIA officer's leaked identity but have warned they cannot guarantee he won't be indicted, according to people directly familiar with the investigation.

What this means is Rove's lawyer, Bob Luskin, believes his client is defintely going to be indicted. So, Luskin is sending Rove back into the grand jury to try to get around the...