Catholic guilt: you can run but you can't hide.

A 65-year-old grandmother of five has confessed to cheating on a high-school English test in 1957. The remorseful woman, whom Eagle Valley High School officials have chosen not to publicly identify, wrote a letter to the current principal of the Gypsum, Colorado school, admitting that she and another student had stolen the answers to the test, the Associated Press reports.

"I know it makes no difference now (after 47 years)," the woman says in her one-page handwritten letter, "except maybe this will keep some student from cheating and help them to be honest--conscience never lets you forget." She said she knew that she had been forgiven by God for her wrongdoing but felt she still needed to confess to the school.

The principal read the letter to every Eagle Valley homeroom class. "You could have heard a pin drop," he said.