Fingerprints left on a ransom note led police to missing 9-year-old

ViewA ransom note proved instrumental in the rescue of 9-year-old Charlotte Sena, who went missing Saturday night while on a family camping trip in upstate New York. 

The note was placed in the mailbox of the family home — which was being guarded by state police — around 4:20 a.m. Monday.

Fingerprints on the ransom...