AD says Petrino's affair was 'several months' long

Arkansas athletic director Jeff Long says the affair that cost Bobby Petrino his job lasted for "a{}period of several months" before the coach recommended hiring his{}mistress.

The detail is disclosed in the letter that Long sent to Petrino{}on Tuesday to tell him he had been fired. The letter also says that{}Jessica Dorrell used a $20,000 "gift" from Petrino to buy a blackAcura car during her first week on the job.The letter was released Friday as part of a Freedom of{}Information Act request submitted by The Associated Press.Long says Petrino deliberately failed to tell him he had{}"engaged in an extra-marital affair" with Dorrell before he told{}Long she should be hired last month. The university put the{}25-year-old Dorrell on paid leave earlier Friday.(Copyright 2012 by The Associated Press. {}All Rights Reserved.)