Has studied various martial arts since he was 10 years old including
Wing Chun, Kali, Silat, Karate, Bagua/Hsing-i.
Has taught defensive tactics, hand to hand combat, knife fighting to
police and military personel from 9 countries on three continents.
Co-founder of Dango Jiro Karate
Is considered one of the pioneers of "reality based self-defense"
First started writing books about streetfighting, but has evolved over
the years to teaching people how criminals think and behave so they can
be safe from crime and violence
Currently resides in Colorado where he runs No Nonsense
Self-defense. (2004)