You are a forensic scientist who has a new case. A beloved family dog has been kidnapped and a handwritten ransom note was left at the crime scene. The note was written in black and demanded  "Give me 10,000 dollars or you'll never see Fluffy the Dog again!" When the police questioned the neighbors, they said that 3 unsavory characters, Manny, Moe, and Jack were seen around Fluffy's house around the time the dog disappeared. Police raided Manny, Moe, and Jack's homes and recovered a black ink pen from each. The police have given you both the ransom note and the ink pens. What experiment or experiments will you do to find out who kidnapped Fluffy? Describe each step you have to do completely to determine the dastardly dognapper.