Will the Emancipation Proclamation be offered as evidence for his defense?
This was a political document used to keep England from siding with the Confederacy. It freed zero slaves except where the Union Army was standing at any point in time.
I'd be tempted to look at the Lincoln/Douglas Debates as Exhibit I.
Also no lesser a soldier of emancipation that Frederick Douglas delivered high praise to Lincoln after Lincoln's death. Douglas wasn't in the habit of letting anyone off the hook.
It's so chic to find fault with our predecessors. Most of us should be a bit more existential. I have often thought Lincoln's worst crime was he had the audacity to be a Republican. It was once said as common wisdom that nothing good ever came from Nazareth. The same "common wisdom" has applied for most of my life regarding the Republican Party.
No. It didn't free a single slave in the US. It only applied to "states in rebellion". The English ridiculed it as freeing the slaves where Lincoln didn't have power to enforce the act, and keeping the slaves in bondage where Lincoln had the power to free them.
Slaves in the Union remained slaves until the passage of the 13th, 14th, 15th Amendments during the Johnson administration.
According to the History Channel, in a reenacted scene, he visited freed slaves, and bowed to them in greeting, and it shocked many that the President of the United States could bow to a black man.