matalon disregarded the family's plea.2015, she prescribed sarah subsys, a fentanyl spray approved specifically for severe cancer pain. in an appointment that deborah says was accompanied by an insys rep. and one day later, that sales rep texting her manager about how to get dr. matalon into the insys speakers program, a front, prosecutors say, to bribe doctors for prescribing their drug. >> what is the patient's last name and date of birth? >> the last name is fuller, f-u-l-l-e-r. first name is sarah. >> this is a ledger. >> right. >> reporter: the family's attorney, richard hollawell, says he was able to track down exactly how sarah got that fatal prescription. getting a subpoena for the phone call an insys rep made to an insurance company, who was pretending to be from the doctor's office. >> you're calling from the doctor's office, correct? >> yeah, dr. matalon's office. >> i would call it the murder weapon, the smoking gun. >> reporter: then misrepresenting her diagnosis. >> and what is the diagnosis for the patient?