Being qualified as an expert witness in gambling addiction, she routinely testifies before local, state and Congressional legislative committees. She is most often called upon by federal public defenders for sentencing hearings and has been involved in many precedent-setting court rulings. More recently, she has also testified in child custody cases involving compulsive gambling. Dr Valerie Lorenz is one of the nation’s foremost authorities on compulsive gambling. Compulsive Gambling: What’s It All About?