He already interrogated Draco under Veritaserum, so he knows that Draco saw his patronus light. That seems not to have swayed him.
Also, if there were going to be a wizard to discover a charm that does something completely impossible, my bet would be on Dumbledore and Voldemort.
He already interrogated Draco under Veritaserum, so he knows that Draco saw his patronus light. That seems not to have swayed him.
Also, if there were going to be a wizard to discover a charm that does something completely impossible, my bet would be on Dumbledore and Voldemort.