United States Attorney Roger B. Handberg announces today that a federal jury returned guilty verdicts against Dr. Steven Chun (59, Sarasota) and Daniel Tondre (52, Tampa). Both were found guilty for conspiring to pay and receive kickbacks and bribes, in the form of speaker fees, in return for prescribing the fentanyl spray Subsys. They were both also convicted on five separate counts of paying and receiving kickbacks on specific dates.