Extreme Joint Locking And Breaking: Restraint and Submission Techniques for the Street
Loren Christensen began his law enforcement career in 1967 when he served in the army as a military policeman in the United States and in Vietnam. He joined the Portland, Oregon, Police Bureau in 1972 and retired in 1997. During those years, he specialized in street gangs, defensive tactics, dignitary protection, and patrolling the bizarre streets of skid row. He now writes full time and teaches martial arts.