By Steve HartmanSeeing her there, cuddled up with her crossword, you would never guess 80-year-old retired schoolteacher Ginny Schrappen had a pen pal in a penitentiary — especially not one accused of murder.   Because when you have people who believe in you and they won't give up on you, then it makes it harder for you to give up on yourself," Johnson said, adding that Schrappen's belief is what helped him get through nearly 30 years of injustice.  Steve Hartman has been a CBS News correspondent since 1998, having served as a part-time correspondent for the previous two years