Fingerprinted after jury verdict?

[parsnip]

Emphasis below--if she had been on trial for weeks, wouldn't the system already have a set of fingerprints?



<snip> from http://www.wftv.com/news/28445941/detail.html

Casey's parents, Cindy and George Anthony left the courtroom without speaking to her as the judge thanked the jury.

Juror number seven, one of the seven women on the panel, appeared to cry as she left court.

Once the jury left, Casey hugged her attorneys and squealed out loud. The lawyers high-fived one another, and minutes later Casey laughed as she was fingerprinted on the convictions for lying to detectives.

<end snip>

Just wondering how this works.