“”Did Jeff Sessions know this when he let Lois Lerner off the hook?””
Wasn’t she let off the hook long before Sessions ever left the Senate?
Yes and no. I have this vague recollection that there was some announcement after Sessions became AG that he would not prosecute Lerner.
“Wasn’t she let off the hook long before Sessions ever left the Senate?”
Yes; long before, IIRC.
Yes, Sessions had nothing to do with her.