"During questioning, Berkowitz said that the "Sam" mentioned in the first letter was Sam Carr, his former neighbor. Berkowitz claimed that Carr's black labrador retriever, Harvey, was possessed by an ancient demon, and that it issued irresistible commands that Berkowitz must kill people. Berkowitz said he once tried to kill the dog, but was unsuccessful due to supernatural interference."
"After consulting with several psychiatrists, police released a psychological profile of their suspect on May 26th, 1977. He was described as neurotic and probably suffering from paranoid schizophrenia and believed himself to be a victim of demonic possession."