When psychologists interviewed David Berkowitz after a yearlong shooting rampage that left six people dead and several more wounded, they diagnosed him as a paranoid schizophrenic. Based on the style of his slayings, he seemed like a classic visionary killer. He claimed he was driven by demons, including one demon he believed to be living inside the black Labrador retriever owned by his neighbor Sam Carr. Son of Sam’s killing spree ended on Aug. 10, 1977, just 11 days after his last murder. He eventually gave a full confession, but a few questions remain. Some investigators theorize that Berkowitz belonged to a satanic cult and may not have acted alone. Maury Terry, a newsman who worked the Son of Sam case, believes the attacks were carried out by five gunmen, including Berkowitz.