kaj larsen travels not front lines of a war few people know about. twisted justice? i just saw him up with the bat and he started to swing, and that s when i reached for the gun. this new york city cop says he fired to save his father s life. i was convicted of second-degree murder. but he would walk free after that conviction was overturned. so how did he end up back in prison. you must have been crushed? crushed when they told you you had to go back. revealing investigations, fascinating characters, stories with impact. this is cnn presents, with your host tonight, brooke baldwin and dr. sanjay gao give up gupta. way off the radar, just south of mexico is a region that s more violent. the northern triangle of guatemala, el salvador, and honduras the deadliest place in the world outside of active war zones. in fact, the homicide rate in honduras alone has more than doubled in five years. cnn s kaj larsen journeyed to the heart of the violence. reporte