John Surratt's real parents?

[Eva Elisabeth]

My belief is that she felt right up to the hour of the shooting that the kidnap plot against AL had been revived and was on for that night. I don't think she knew that at that point she was assisting the men in a murder conspiracy. Booth involved her and duped and manipulated her because she was useful to him and she was willing to help. I don't think she was ever told that the plan had switched to murder.

I have always understood death penalty would also (most likely?) have been imposed in case of a plot and it's execution to kidnap the president. My question: What sentence would JWB and the four executed conspirators have gotten for at first successful kidnapping instead of murder? In other words - would kidnapping (and thus her possible belief this plan was still pursued) actually have saved Mary Surratt? (She must have been aware that it was a very serious crime to abduct the president and men have been hung for less.)