Not really a source to be honest.
First it was they admitted it from the mouth of Khan, now the story has changed.
I really think the silence speaks volumes on actual proof.
As I have said before. With Butt, Amir, Asif it was clear as day from day one, evidence on the table. This story seems to have fizzled out.
I think they will get banned, but I think what they thought happened didn't, and now they don't know how to come back from it.
In my opinion the bookie approached them, they simply left when they realized what it was, didn't tell anyone, and were found that they were with the bookie. Thst deserves a ban for sure, but far from the, they acted on what the bookie wanted.