As has been stated, modification of legal forms in this fashion could easily be grounds for having the charges thrown out of court, and I find nothing amusing about that. I do think, however, that this story was appropriately placed in Horror Stories.
I don't think we should over-react to what was after all intended as an in-office joke that escaped into the wilds (that'll teach him to alter templates on the server rather than locally).
As long as there are no dire legal consequences then the officer will have learned lesson enough I would hope. A stern talking to about adhering to QA procedures should do the job.