The voice is always one of the best self-defense tools you could ever use. Watch and teach your children this free anti-abduction and kidnapping vocal defense technique.Expert: Darryl Johnson Contact: www.onparent.com Bio: Darryl Johnson has been training students in martial arts for 16 years and is himself trained in Krava Maga, Muay Thai, and Jiu-Jitsu. Filmmaker: Paul Kersey