David Christiansen is a Deputy with the DeKalb County Sheriff’s Office. He has been a police officer since 2006. He is a certified Drug Recognition Expert Instructor, Traffic Crash Reconstructionist, Commercial Vehicle Officer, a Field Training Officer and an SFST Instructor. David is a graduate of Western Illinois University.

Ari Briskman is a Sergeant with the Lake County Sheriff’s Office. Has been a police officer since 2007. He is a certified Drug Recognition Expert Instructor, Traffic Crash Reconstructionist, a Field Training Officer and an SFST Instructor. Ari is a graduate of Western Illinois University.