( CNN ) -- Erin Andrews , the ESPN reporter who was secretly videotaped nude in 2008 , has been receiving death threats , her attorney told CNN on Friday . Several threatening e-mails regarding Andrews have been sent to sportscaster Dan Patrick since last September , according to Marshall B. Grossman , Andrews ' attorney . `` Until very recently , [ the e-mails ] were of a sexual nature , but then turned violent '' last month , Grossman said . He said the e-mails received in March `` are specific , they 're violent , they identify the location and method of intended murder . '' Grossman said the existence of the threats were first revealed to Andrews on Thursday morning . The e-mails were provided to Andrews ' representatives by DirecTV , which carries the Dan Patrick Show . Patrick was formerly at ESPN . The FBI began work on the case on Thursday and believes it has identified the individual responsible for the threatening e-mails , Grossman said . Andrews is getting round-the-clock security , Grossman said . Grossman has also requested heightened security at Los Angeles ' CBS Television City , where Andrews is competing on the show , `` Dancing with the Stars . '' In March , a federal judge sentenced an Illinois man to two and a half years in prison for taping Andrews in the nude . The taping took place through a hotel-room peephole , and the video was posted on the Internet . Michael David Barrett , 49 , pleaded guilty to a federal stalking charge in December after prosecutors accused him of altering hotel peepholes so he could shoot video of Andrews while unclothed . CNN 's Sonya Hamasaki contributed to this report .
Lawyer : ESPN 's Erin Andrews getting death threats . FBI says it has identified person responsible for the threatening e-mails . Illinois man sentenced for secretly taping Andrews nude , posting videos online .