While walking pass looking for the wolf, a hunter named Dave heard little red riding hood calling out and ran to help.
Hunter Dave caught the big bad wolf just in time and even managed to save little red riding hood's grandmother too.
While on the scene police found a mystery hair that they didn't know who it belonged to. They put it the evidence container to investigate later.
When investigating the piece of hair they notice the hair's pigment is very concentrated black with a frag mental medulla pattern. The hair was also very thick. Kind of identical to little red riding hood grandmother's wig.
When tested in the lab it was confirmed the piece of hair is identical to Grandma Red's, covered in saliva from a hair ball from the wolf. This also confirmed him eating the grandmother.
Eventually the wolf was convicted and everyone else lived happily ever after. THE END.