Jarriel began his illustrious career with "20/20" in 1979, shortly after the program's debut, dedicating 23 years to shedding light on underreported stories. His work covered harrowing topics, including conflicts in Mozambique and Cambodia, and the famine in Ethiopia, showcasing his commitment to journalistic integrity. “We did not do happy stories together,” remarked long-time producer Janice Tomlin, highlighting the weight of their shared work.

Among his most poignant contributions were exposés on the plight of orphans in Romania. Over a decade, Jarriel and Tomlin uncovered horrific conditions within the country’s orphanages, where children were often treated with neglect and cruelty. “These are state-run asylums shrouded in secrecy,” Jarriel remarked, as he aimed to bring attention to the hidden struggles of these vulnerable children. Tomlin vividly recalled the chilling scenes they encountered, likening the institutional conditions to Auschwitz. Through their dedicated reporting, Jarriel's work not only informed the public but also ignited discussions on humanitarian issues worldwide.