Who said anything about a child's drawing? I said pictures. Or should I have been more exact for your pedantic self and said photographic pictures?. And note, person 2 collected the pictures. He supplied support for his claim.
Also, if Person 2 did refute a child's drawing and came to the conclusion, Person 1 would say that Person 2 did not sufficiently meet the burden of proof.
Posting a few photographs from the internet and explaining them as the result of over exposure or other photograph issues does not prove that the boogeyman does not exist.
The absence of evidence argument is used to disprove the boogeyman in your example: "Therefore, I conclude that there is not enough evidence to confirm the existence of a boogeyman."
The point is that Person 2 went and did the legwork to back up his claim. If Person 1 wants to refute that claim with another claim, Person 1 needs to do the legwork. Person 2 cannot just say, The bogeyman does not exist, prove me wrong as you seem to think you can by making negative claims without backing them up.
Otherwise it turns into a school yard spat
Person 1: The bogeyman doesn't exist
Person 2: Yes he does, here is a picture of him
Person 1: That in not a real picture of the bogeyman
Person 2: Yes it is, why isn't it real?
Person 1: I don't have to tell you, I gave a negative claim
Person 2: But why isn't it real?
Person 1: Negative claim
Etc.
As has been shown, ALL claims need to be supported. Do you really need me to go look up the link that specifically states so again?