Dr. William Husel is facing 25 murder charges for allegedly using fentanyl to kill critically-ill patients. He adamantly claims innocence and files a civil lawsuit against his employers. Investigators, however, say that they've established escalation and intent after Williams continuously administers increased levels of the drug to patients.Joining Nancy Grace to discuss:Mark Tate: Savannah, Ga., Attorney, represents Chatham County, South Carolina; suing opioid manufacturers      Dr. William Morrone: Chief Medical Examiner of Bay County Michigan, Chief Medical Officer for Recovery Pathways, created NEW portable treatment center  Bruce Johnson: Owner of ISP Investigations & Master Sgt. Region One Crime Scene Commander, Chicago Metro Area (Ret)  Dr. Caryn Stark: NYC PsychologistHaley Nelson: Investigative reporter at ABC 6 / FOX 28, Columbus, Ohio