The hunter could have applied for a special permit, which is accompanied by a fee of $10 per point for deer antlers. The fee is $20 per point for elk antlers.
MORE:
http://lancasteronline.com/news/local/q-a-why-couldn-t-the-columbia-hunter-keep-the/article_900844f0-cdea-11e6-a671-635303ea9931.html