(PHILADELPHIA) -- Michael Vicks' past is apparently still haunting him to this day. Phillymag.com reports that the Philadelphia Eagles quarterback has cancelled three book-signings because he received violent threats.
Vick was supposed to sign copies of his autobiography, Finally Free, at Barnes and Noble book stores in Atlanta, New Jersey, and Exton, Pa. The events were cancelled due to threats directed towards Vick, his family, bookstore employees and property.
Before he signed with the Eagles in 2009, Vick spent 18 months in a federal prison for his role in running a dog-fighting operation. Vick bank rolled the operation and even assisted in the killing of dogs who didn't perform well.
Still, Vick has been as close to a model citizen as possible since signing with Philadelphia. He has worked closely with The Humane Society of the United States to speak out against animal cruelty. He has also made numerous appearances at local schools to talk to students about the dangers of dog fighting and getting mixed in with a bad crowd.
On the field, Vick has had an up and down career with the Eagles. He was an MVP candidate in 2010, but has been inconsistent ever since.
Copyright 2013 ABC News Radio