Dipak Desai received a life sentence for second-degree murder following an outbreak of hepatitis C at his Endoscopy Center. Desai ordered staff to reuse needles and vials to save money, and spread to the disease to at least seven patients -- two of whom have died. What did we learn from the long legal saga of Dr. Desai? Who is responsible when medical procedures go horribly wrong? And when does medical malpractice become criminal conduct?