was accused of slapping Peter Grant's 11-year-old son Warren over the removal of a dressing room sign), escalated into an all-out brawl in which Matzorkis was brutally beaten. Led Zeppelin's second Oakland show took place only after Bill Graham signed a letter of indemnification, absolving Led Zeppelin from responsibility for the previous night's incident. However, Graham refused to honour the letter, and assault charges were laid against Grant, Cole, Bindon, and John Bonham when the band arrived back at their hotel. All four pleaded nolo contendere and received suspended sentences. Bindon was dismissed by Grant and returned to England. Grant later stated that allowing Bindon to be hired was the biggest mistake he ever made as manager. Whilst tour manager for Led Zeppelin, Cole developed substance abuse problems. He was fired from his position as road manager for Led Zeppelin's final concert tour of Europe in 1980 because Peter Grant was concerned about his drug and alcohol abuse, and was replaced by Phil Carlo. Sent to Italy to detox, Cole was mistaken for a terrorist involved in the 1980 Bologna railway station bombing and was temporarily imprisoned. Post-Led Zeppelin After the end of his involvement with Led Zeppelin, Cole served as the tour manager for Eric Clapton, Black Sabbath, Lita Ford, Ozzy Osbourne, Edan Everly, Black Uhuru, and Three Dog Night, managed Fem 2 Fem and, most recently, toured with Gipsy Kings, Crazy Town and Fu Manchu. According to his publisher HarperCollins, he divided his time between Venice, California, and London. Contributions to published accounts Following Led Zeppelin's breakup in 1980, Cole contributed to unofficial Led Zeppelin biographies, most infamously Stephen Davis' biography Hammer of the Gods. Cole claimed he was only paid $1250 by Davis for his revelations, which make up a large proportion of the book. Davis for his part has claimed that Cole "was responsible for much of the mayhem around Led Zeppelin." In an interview with New Musical Express magazine in 1985, Robert Plant dismissed many of the claims made by Cole in Davis' book, and discussed why Cole was removed as tour manager: Cole also wrote his own book, an unofficial account of the band called Stairway to Heaven: Led Zeppelin Uncensored, with Richard Trubo. Cole's book raised the ire of Jimmy Page, who once commented: Led Zeppelin bass player John Paul Jones expressed similar views about Cole's reliability, stating in a magazine interview that