the unit's controversial new director, jack balentine, a police detective but no prior background in. >> i spent my whole career undercover. seemed like a great challenge. >> balentine was as comfortable posing as a hit man or drug dealer as he was in the media spotlight. his first move as director, launching an intensive training program to transform fire fight nears criminal investigators with the purr ower to arrest. and he admitted the learning curve was steep. >> we were pretty comfortable on a firetruck. pretty comfortable to fight a fire. then we are asked to investigate the fire. we really didn't have a clue. >> all they have got to do is just get probable cause. >> my job is to make sure that day can realize success on every one of the cases that they go on. >> between balentine's leadership, the clearance rate skyrocketed, solving just 22% of cases in 2007. 65% in 2010. the highest in the country. but the shining record was about to be called into question. >> 911, where is your emergency? >> there is a fire. >> hold on i will put you through to the fire department. >> may