Phil Spector, an American record producer, musician and songwriter known for his innovative recording practices and entrepreneurship in the 1960s, followed decades later by his trial and conviction for murder in the 2000s.

Spector developed the “wall of sound,” a music production formula he described as a Wagnerian approach to rock and roll. He is regarded as one of the most influential figures in pop music history.

In 2009, after spending three decades in semi-retirement, he was convicted for the 2003 murder of Hollywood actress Lana Clarkson and sentenced to 19 years to life in prison. He died in prison on Jan. 16 at the age of 81, according to the California Department of Corrections and Rehabilitation.