Mr. Red Herring was found dead in his backyard. He was about a foot away from his back porch, lying next to his personal handgun. A bloody foot print was also found on the porch. Analysis of a bullet found nearby suggest that, based on the striation marks, the bullet that killed Herring came from a gun discarded in a nearby trash can. He apparently had a date that night with Mrs. Scarlet. Based on various evidence, the forensics team also created a digital rendering of the crime. In this story, which is an example of demonstrative evidence?