Sarah Root is dead. Eswin Mejia is missing. And authorities are scrambling to answer how the 19-year-old accused drunken driver went missing just days after his arrest in Root’s death. A World-Herald review of Mejia’s case shows a systemic failure — from county pretrial release staff to the county judge to federal immigration enforcement officials — to ensure that the man charged with felony motor-vehicle homicide in Root’s death would answer in court to the charge. “He’s gone,†a law enforcement official told The World-Herald. He’s gone because of a lack of communication and common sense among governmental agencies, Douglas...