From CNN's Paul Courson

WASHINGTON (CNN) -- Detailed talks over the use of classified White House documents in a criminal case are part of a hearing that continues Thursday involving an indicted former aide to Vice President Dick Cheney.

Lewis "Scooter" Libby has pleaded not guilty and is preparing for a January court date on a five-count indictment charging him with lying to investigators and a grand jury. He resigned last October as Cheney's chief of staff when the indictment was returned.

Wednesday, after a three-hour delay because of a courthouse security alert, prosecutors and defense attorneys went behind closed doors with the judge to try to establish a framework for the use of notes and summaries from White House meetings that included Libby, Cheney, and sometimes President Bush.

Defense and prosecutors are addressing two questions: the extent to which the defense will use the documents at trial, rather than trial testimony, and how the defense would overcome government objections the material should be deemed hearsay. Libby is fighting a count of obstruction of justice, two counts of perjury and two counts of making false statements in what he told investigators about onetime CIA operative Valerie Plame.