A founding member of music group Beastie Boys took the stand in a Manhattan court on Tuesday. Adam Horowitz, or “Ad-rock,” appeared in the federal courtroom to testify against Monster Energy Drink in the band’s copyright trial. According to the New York Daily News, Ad-rock, 47, testified that the band never licensed their music for promotional use.

The copryright lawsuit was filed in August 2012 after Monster Energy Drink posted a promotional video for their annual snowboarding competition that included a remix of several Beastie Boys songs. NBC News reported that one of Monster’s lawyers, Reid Kahn, stated in court that the use of the songs was a mistake on the part of an employee, who thought the songs were licensed.

In March of 2014, the Beastie Boys settled a suit against Goldieblox, a company who used a parody of their song “Girls,” in a promotional advertisement. At the time, the band wrote an open letter stating, “long ago we made a conscious decision not to permit our music and/or name to be used in product ads.”

Another founding member of band, Adam Yauch, died in 2012 of cancer, and indicated in his handwritten will that he did not want his music promotionally licensed.