david clinger is a former officer. we relied on stories from him before. he is the author of the book "into the kill zone." david, good to see you. horrible it is under these circumstances once again. >> good to be here. >> this murder is different in the complexity of character. in the end of the day, he is one simple thing. what points out to you? >> i think they need to know law enforcement is a dangerous profession. for that, police officers are willing to go out and protect people and put themselves in harm's way. that is what they are trained to do. you have murderers out hunting police officers, that's not what you sign up for. everybody around the country needs to rally around these police officers, the police officers in dallas, texas. police officers shot and survived around the country in the last week. thank god men and women are willing to put on the badge to protect us. >> mark lemont hill, you have this situation. there are similars in apparent motive, but also preparation of both killers. both military trained. it seemed to give them a tact

david clinger, professor who studies policing and wrote a book "into the kill zone."m sorry for your loss. >> thank you. >> it sounds like you had an amazing friend in montrel jackson. i only know him through his words and being here and putting his life on the line and he had a son and wife and a lot of friends like you. where was he coming from with what he wrote? >> you know, for me, i only know him as a cop, you know, i've never been with him with his family. after him being an officer for ten years, i would see him constantly. you know, for me is what people do, when you don't think people are looking at you. you know, it is easy to do the right thing when people are, and i've watched him at football games and parades, and just being out in the community. every time he does the right thing. i think his facebook post, i don't think, i know, it shows exactly what baton rouge is. you know, he addresses how he feels out of uniform, but he also expresses that, hey, i love my job. if anybody needs a hug, prayer, come and see me. i think it summed it all up. it is devin