Exclusive: Supreme Court leak investigation heats up as clerks are asked for phone records in unprecedented move

Supreme Court officials are escalating their search for the source of the leaked draft opinion that would overturn Roe v. Wade, taking steps to require law clerks to provide cell phone records and sign affidavits, three sources with knowledge of the efforts have told CNN.

Some clerks are apparently so alarmed over the moves, particularly the sudden requests for private cell data, that they have begun exploring whether to hire outside counsel.

The court's moves are unprecedented and the most striking development to date in the investigation into who might have...