Supposedly he asked to be subpoenaed. Can’t testify voluntarily.
Fantastic if so. Where has that been reported?
I'm, not a legal scholar but I thought you only needed to subpoena a witness if there is concern they will not show up at a trial/hearing. If they show up willingly after being requested to, I don't know why they'd need to be subpoenaed. That would seem like a waste of time, resources etc...