Hopefully, he suffered greatly.
Italian prisons are not like Guantanamo. You can’t get a lot of stuff to read, certainly not a Koran. Pictures of women in any state of (remote) undress are not blacked out to keep from offending your sensibilities. The food sucks. He got no recreation and the holding conditions are horrendous. Temperatures in the summer are probably maintained at around 80F and in the winter at around 50F to save on costs. Medical care? Ma stai scherando?! He was confined at age 55 to an Italian jail cell. He didn’t get what the Guantanamo inmates got.