An aide to House Speaker Dennis Hastert on Wednesday went before ethics investigators in private to explain how the office handled complaints about former Rep. Mark Foley’s behavior toward former pages.

Ted Van Der Meid, who testified for about six hours Wednesday, appears to be one of the last witnesses. He was the chief liaison between the speaker’s office and the House clerk responsible for the page program. The House ethics panel is investigating whether lawmakers and staff aides acted properly when learning of Foley’s messages to ex-pages and other possible inappropriate behavior.

The panel is in its third week of hearing testimony and seems unlikely to complete its probe before the Nov. 7 elections.

Van Der Meid was a central figure in the handling of a complaint last fall from a former page from Louisiana. Hastert’s office was alerted to the “over friendly” e-mails and dispatched then-Clerk of the House Jeff Trandahl and Rep. John Shimkus, R-Ill., to confront Foley, R-Fla.

Former top Foley aide Kirk Fordham has told the committee that Hastert’s chief of staff, Scott Palmer, knew of earlier incidents involving Foley.

Foley abruptly resigned Sept. 29 after being confronted with sexually explicit e-mails sent in 2003 to a former page from Oklahoma.

Rather than investigating Foley, the four-member investigative panel is trying to determine who knew about his behavior toward pages and whether more should have been done to stop it.

A key question for investigators is who else knew about Foley. Fordham’s account has been disputed by Palmer, but Trandahl reportedly has backed up Fordham’s story.

The panel may want to know what Van Der Meid knew about earlier incidents regarding Foley. For example, the panel has been asked to look into rumors that several years ago Foley tried to enter the page dorm while drunk, an incident that Fordham has testified about.

Trandahl and Rep. Jim Kolbe, R-Ariz., learned in 2001 or 2002 of an episode in which Foley sent an ex-page inappropriate e-mails. Kolbe has not been contacted by the ethics panel about testifying, spokeswoman Korenna Cline said.

In those instances, Foley’s inappropriate behavior with former pages was handled by a few staff aides and lawmakers, rather than being investigated more fully.

The panel heard Tuesday from Hastert. He said he answered questions to the best of his ability, but his recollection differs from other GOP leaders.