Shot CallerBy: Sara Driscoll Series: NYPD Negotiators In Jen J. Danna's gripping suspense series, NYPD detective Gemma Capello is called to Rikers Island, where a prison riot threatens to become a bloodbath On Rikers Island, tensions always run high, especially in the Enhanced Supervision Housing unit. The ESH is home to Rikers' most dangerous offenders, many of them members of rival street gangs. When Gemma Capello and her team get word of an uprising at the