Dozens of adults and children, all clad in white, stood in a line. A holy man handed each a cup of ayahuasca, a muddy-looking hallucinogenic brew. Among those imbibing from the holy mans decanter were prison inmates, convicted of crimes such as murder, kidnapping and rape. Im finally realizing I was on the wrong path in this life, said Celmiro de Almeida, 36, who is serving a sentence for homicide. Each experience helps me communicate with my victim to beg for forgiveness, said Mr. de Almeida. The provision of a hallucinogen to inmates ... reflects a continuing quest for ways to ease pressure on Brazils prison system. The countrys inmate population has doubled since the start of the century ... straining underfunded prisons rife with human rights violations. Around [2002], Acuda, a pioneering prisoners rights group in Porto Velho, began offering inmates therapy sessions in yoga, meditation and Reiki. Two years ago, the volunteer therapists at Acuda had a new idea: Why not give the inmates ayahuasca as well? Acuda had trouble finding a place where the inmates could drink ayahuasca, but they were finally accepted by an offshoot here of Santo Daime, a Brazilian religion founded in the 1930s. Many people in Brazil believe that inmates must suffer, said Euza Beloti, 40, a psychologist with Acuda. This thinking bolsters a system where prisoners return to society more violent than when they entered prison. At Acuda, she said, we simply see inmates as human beings with the capacity to change.