The evidence that sealed Mrs. Surratt's fate

[L Verge]

To me, the second in command terminology refers to the kidnap plot - which I still think was sanctioned by the Confederacy until around the first of April. When the kidnapping didn't happen, I think Surratt was assigned to clean-up detail under Gen. E.G. Lee in anticipation of the fall of Richmond. Technically, he was back to what he had been doing for almost three years - following orders from the Confederate espionage system. He was no longer assigned to Booth.