stuck in a ditch sunday. trooper vincent realized the vehicle matched the description of a reckless driver and started asking him about it. i watched that shotgun blast on that tape. i saw my trooper go backwards. good samaritans like this man beat authorities to the scene. wrestling with daigle investigators say and subduing him with the wounded officer s handcuffs. me and sam handcuffed him and then we tended to the officer. he was an older guy. took three men to hold him down. on average a law enforcement is killed in the line of duty every two and a half days in this country. the potential of death is there in everything that you do because you don t knows what on the other side of that door or
reporter: an emotional state police colonel describes the chilling words of the alleged killer of trooper steven vincent, captured on his squad car s dash cam. you can hear him breathing in there and telling him you re lucky, you re lucky. you re going to die soon. authorities believe 54-year-old kevin deagle killed his roommate before encountering the louisiana state trooper. i m sure you re going ask the question that mr.ing day is involved in this and yes we re going to presume that. reporter: according to investigators, the pickup deagle was driving in was stuck in a ditch sunday. trooper vincent realized the vehicle matched the description of a reported reckless driver and started asking him about it. the suspect pulled out a shot n shotgun, shooter trooper vincent. i saw my trooper go backwards and back towards his unit where he was going to try to get help out there.