Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Interviewer: What happened afterwards to the picture?

Mary Moorman: At 12:30, the doorbell rang, and it was the FBI, and they said they needed to take the picture. A few days later it was brought back. I don't know the period of time that passed, but then the CIA looked at it, the Secret Service looked at it, and the FBI looked at it again.

Interviewer: Did they just look at it or did they take it from you again?

Mary Moorman: They took it, and each time, they would leave me a receipt. And when the FBI took it the second time, when it was returned, it had a big thumb print. 

Interviewer: So, the thumb print was put on your picture by someone at the FBI?

Mary Moorman: Yes, and it would be nice to know who it was so I would know who to be mad at. 

https://www.youtube.com/watch?v=usHuJpWCIgY