 On 18 October, Lennon and Ono were arrested on charges of drug possession; Lennon maintained he had been warned of the raid and that the drugs were planted by the arresting officers from the London Drug Squad.Rock critics also entered the political debate over "Revolution", whereas politics had rarely been a subject of interest in their field before 1968.Greil Marcus commented that political detractors of "Revolution" had overlooked the "message" of the music, "which is more powerful than anyone's words".