From CNN Congressional Correspondent Dana Bash

WASHINGTON (CNN) -- A former Republican congressional aide, who says he tried to warn the House speaker's top aide about then-Rep. Mark Foley's, R-Florida, inappropriate behavior towards pages, expects to testify this week before the House ethics committee.

Kirk Fordham's attorney tells CNN he was in touch with the Committee on Standards of Official Conduct on Friday, and expects Fordham to tell the panel under oath what he has been saying publicly: that House Speaker Dennis Hastert's, R-Illinois, chief of staff, Scott Palmer, knew about Foley's worrisome conduct long before the speaker's office admits.

And sources familiar with Fordham's account of events tell CNN he was so concerned about Foley's behavior, he arranged a meeting with Foley and Palmer sometime in or before 2003 to show Foley they were serious about making him stop this inappropriate conduct with pages. Palmer's only response so far has been "What Kirk Fordham says did not happen."