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NEW YORK -- Matt Walsh, the former New England Patriots' video assistant, is set to tell NFL commissioner Roger Goodell and U.S. Senator Arlen Specter what he knows about the team's videotaping policies in separate meetings Tuesday.

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A discussion between Walsh and Goodell was scheduled to begin at 7:30 a.m. ET in New York. Walsh also will travel to Washington to meet in the afternoon with Specter, who has shown a keen interest in the videotaping saga which resulted in Walsh turning over eight tapes he had of the Patriots taping opposing coaches' signals. The tapes are from 2000, 2001 and 2002.

Goodell arrived at 6:38 a.m. ET on Tuesday at the NFL's offices on Park Avenue in New York. He stopped briefly to speak with reporters, but did not address what he expected to hear from Walsh before entering the building.

Walsh, wearing a somber expression and accompanied by his attorney, Michael N. Levy and two other men, arrived at 280 Park Ave. at 7:25 a.m. ET. Levy declined comment to reporters on Walsh's behalf, noting that Walsh's agreement with the NFL requires him to talk to the league before he speaks with anyone else.

The meeting between Walsh and Goodell ended shortly before 11 a.m. ET.

Stand firm, Roger

As much as many people would like to dismiss Spygate, several questions remain. It's Roger Goodell's job to seek answers to those questions when he meets with Matt Walsh on Tuesday, urges ESPN's Sal Paolantonio. Story

Walsh agreed to turn the tapes over to Goodell and the NFL last week. He suggested in January that he had information about the team's policy of taping the signals of opposing coaches.

The tapes Walsh turned over didn't include tapes of a Rams walk-through prior to the 2002 Super Bowl, which had been reported by the Boston Herald prior to the Super Bowl. "Walsh does not possess such a tape. Mr. Walsh has never claimed to have a tape of the walk-through. Mr. Walsh has never been the source of any of the media speculation about such a tape. Mr. Walsh was not the source for the Feb. 2 Boston Herald article," Levy told the New York Times earlier this month.

In September, the Patriots were fined $250,000 and lost a first-round draft pick this year, while head coach Bill Belichick was fined $500,000, for illegally videotaping signals of the New York Jets in a 2007 game, which sparked the "Spygate" controversy.

Earlier, after Goodell issued an order, the Patriots turned over additional tapes from the 2006 and '07 seasons. Those tapes were destroyed. Specter has since criticized the NFL for destroying those tapes and for its handling of the investigation.

Members of Specter's staff looked at the tapes Walsh handed over on Friday at the office of the NFL legal counsel in Washington, a source told ESPN.com's Mike Fish. Specter was expected to look at the tapes on Monday to prepare for his meeting.

Upon receiving the tapes last week, NFL spokesman Greg Aiello said: "This is consistent with what the Patriots had admitted they had been doing, consistent with what we already knew."

"We're not going to comment," Stacey James, the Patriots' vice president for media relations, said last week. He added he expected the team will wait to issue a statement until after Walsh meets with Goodell.

Walsh, a Patriots employee from 1997-2003, reached an agreement with the NFL last week to turn over the tapes in exchange for being indemnified from all future legal fees.

The list of the Walsh tapes indicates that the Patriots taped offensive and defensive coaches in regular-season games against the Miami Dolphins, Buffalo Bills, Cleveland Browns and San Diego Chargers. The team also made video of the Pittsburgh Steelers in the 2002 AFC Championship Game.

ESPN.com writer Pat Yasinskas and The Associated Press contributed to this report.