Arguably one of the most successful and influential figures in the history of pop music, producer Phil Spector was also one of its most notorious, thanks to decades of erratic and even dangerous behavior that culminated in a shocking 2009 murder conviction. Four decades prior, Spector was regarded as an eccentric visionary whose signature production technique, a Wagnerian assault on the senses called the "Wall of Sound," generated some of the greatest songs of the 1960s and 1970s, including the Ronettes' "Be My Baby," the Righteous Brothers' "You've Lost That Lovin' Feeling," the epic "River Deep Mountain High" by Ike and Tina Turner, as well as the Beatles' Let It Be, John Lennon's Imagine and George Harrison's All Things Must Pass. Brian Wilson of the Beach Boys and Bruce Springsteen echoed Spector's studio brilliance in their own equally legendary music, but Spector's own personal demons rendered him irrelevant by the end of the 1970s. He surfaced sporadically throughout the next decades, usually in stories about his increasingly bizarre lifestyle, before his headline-grabbing 2003 arrest for the murder of actress Lana Clarkson. The accompanying trial brought Spector's paranoia and violent impulses into a harsh spotlight, which largely erased the glories of his musical legacy. His 2009 prison sentence was a tragic end for a rock-n-roll icon whose pursuit of pop perfection led him into madness.