Drug addiction is a tough nut to crack.  When you add co-occuring disorders, namely,  a host of mental illnesses that plague many addicts,  it becomes near impossible for some to recover and stabilize their lives.   To Kathleen Sciacca, trying to understand and deliver a reliable system of dealing with dual diagnosis and drug addiction has become a personal goal.  You can hear Kathleen discuss her work in this you-tube clip:   Motivational Interviewing