The source provides an overview of Roberto José Carmona, known as "The Human Hyena," one of Argentina's most infamous serial killers. It explores his difficult upbringing, detailing alleged abuse that may have contributed to his criminal path. The text recounts his violent history, including the murders of Gabriela Ceppi, Héctor Vicente Bolea, Demetrio Pérez Araujo, and Javier Bocalón, highlighting his remorseless nature and the multiple life sentences he received. It also examines psychological evaluations that diagnosed him as a psychopath and the systemic failures that allowed him temporary release and facilitated his 2022 escape. Finally, the source discusses the public fascination with Carmona and the broader societal impact of his crimes in Argentina.