Season of the Witch: Enchantment, Terror, and Deliverance in the City of Love by David Talbot:
As hard drugs took their toll on Haight-Ashbury, the neighborhood descended into crime and squalor. By 1969, most of the stores on Haight Street were boarded up and vacant. Cats were said to be hard to find on the streets, because starving junkies were hunting them for food. The neighborhood was hit by a wave of grisly drug murders. A twenty-three-year-old biker who claimed he had been high on acid for eighteen straight months were pulled over by police one day. He was driving a stolen black Volkswagen owned by an unemployed flute player turned drug dealer. The severed arm wrapped in blue suede that police found in the back of the car also turned out to belong to the flute player. “I’m very, very hazy about that arm,” the biker told his lawyer after he was arrested on murder charges.