Are you insane? No I mean that seriously. You think that it is actually worse to look at forbidden pictures than to murder someone? Seriously?
The worst possible scenario for the images would have been if he had created them himself, but this seems unlikely seeing that he was only charged with possession.
The second worst possible scenario would've been if he had paid for them, which isn't necessary with current technology. By paying for it, you are in a way supporting the industry.
The third scenario is that he downloaded it through p2p which has no effect on the original producer and does not provably create incentive to make more. If it does, it is so neglible as to be practically non-existant.
Furthermore there is the underlying assumption that the pictures depict sexual abuse, which is not necessary for the images to be classified as child pornography. Infact it is possible (read likely) that the pictures are only nude posing pictures, and in that case there is no actual sexual abuse behind the creation of the images. If there is no abuse it is not possible for the abuse to "create further abuse".
In addition to this you assume that abuse leads to further abuse which has not been proven. The cause for paedophilia is unknown.
You are making too many assumptions.