FBI agents arrested 27-year-old Kevin Cogill on Wednesday morning on suspicion of violating federal copyright laws. Cogill appeared in court in the afternoon wearing a T-shirt; his girlfriend sat court and afterward said, “Rally the troops,” but declined further comment.

Federal authorities say Cogill posted nine unreleased Guns N’ Roses songs on his Web site in June. The songs were later removed.

In later posts, Cogill wrote that the FBI had questioned him and asked his readers if any of them knew a good attorney. He was represented Wednesday by a federal public defender.

According to an arrest affidavit, Cogill admitted to agents that he posted the songs on his Web site. Prosecutors said Wednesday the leak could result in a “significant” financial loss for the band.

Cogill will not face any special Internet restrictions, but was ordered to appear in court for a preliminary hearing on Sept. 17.

No statement was issued by the band or frontman Axl Rose after the arrest.

“Chinese Democracy” is a much anticipated - and repeatedly delayed - new album by Guns N’ Roses that is more than 10 years in the making. At least one of the album’s songs could be heard legally: The band wrote on its Web site in July that its track, “Shackler’s Revenge” will be featured on the video game Rock Band 2, slated for release in September.