The forewoman spoke only vaguely about the nine-day deliberations, saying jurors entered "neutral" and meticulously reviewed the evidence. She broke into tears as she described the "painful" process of convicting someone of murder.
"You are talking about another human being. We all had hearts. We all have people we love," she said
Five other jurors attended the news conference, but declined to speak to reporters.
Spector burst onto the music scene in 1958 when he recorded the hit "To Know Him Is to Love Him" with classmates from Fairfax High School. The title came from an inscription on the gravestone of Spector's father, who had committed suicide. He moved into producing and developed a new technique, known as the "Wall of Sound," in which tracks were layered over one another to produce a lush, symphonic effect that changed pop music.
He went on to work with musical acts including Tina Turner, the Ronettes, Darlene Love, the Beatles, the Ramones and Celine Dion.
He was inducted into the Rock and Roll Hall of Fame in 1989. In later years, he has worked less and less, reportedly because of disputes with record companies and musicians about the pace of his work and his volatile temper.
Times staff writer Victoria Kim contributed to this report.