Following a lengthy trial, U.S. District Judge Denise Cote has today ruled that Apple conspired to raise the price of e-books. Another trial for damages will follow at a later date, Reuters reports.

Last year, Apple was hit with an antitrust case from the U.S. Department of Justice over the pricing scheme of e-books in Apple’s iBookstore. Since that time, 11 executives at Apple have already been deposed over the issue, but the Department of Justice is demanding Tim Cook be involved, and they just got their way.

U.S. District Judge Denise Cote granted the Justice Department’s request to get Cook to testify on the ebook antitrust case for four hours.