Step one: Has your little brother been stealing your Cheetos? What do you think

Step 2: You know that Cheetos dust will glow orange in the dark when hit with ultraviolet light.
You borrow a "black light" which is an ultraviolet light.
You wait until some of your Cheetos are missing.
You drag your little brother into your bedroom, turn off all the lights and turn on the ultraviolet light and aim it at your brother.

Step 3: You found that:
There was an orange glow around your brother's mouth and on his fingers.

Step 4: In CER Format, answer the following question: Has your little brother been stealing your Cheetos?

Hint: What were the two possible results of your experiment and what would each result mean?