Dr. Robert Shulman weighs in on Vester Flanagan's mental health

The disgruntled former television reporter who murdered two of his former colleagues during a live interview Wednesday morning had a long history of erratic behavior at various workplaces, including acting aggressively toward colleagues and claiming racism was behind uncomplimentary evaluations.

Dr. Robert Shulman, a psychiatrist with Rush University Medical Center, talks more about the mental health of the shooter.