The so-called AIPAC Case, involved espionage charges against three persons: Larry Franklin, Steven Rosen and Keith Weissman. Franklin pleaded guilty in 2005; and would have testified if there had been a trial. There was none.

Following 4 years of lengthy pleadings (indexed and linked at the above url), the DoJ filed a May 1, 2009 motion to dismiss the superseding indictment against Rosen and Weissman, which effectively terminated the case.

Larry Franklin is now talking through Jeff Stein (CQ Politics), who is an experienced reporter on the intelligence beat. There are three articles (with perhaps more to come):

Israel 'Spy Scandal' Figure Larry Franklin Breaks Silence

‘Secret’ Rome Meeting Recounted by AIPAC Spy Case Figure (5 pages)

AIPAC Spy Figure Larry Franklin Describes Mafia-Style Murder Threat

The usual caveats apply. These articles are based on statements which may be motivated by self-interest; have not been subjected to cross-examination; and have been or may be disputed by other persons named in them.