Two days after the assassination attempt on former President Donald Trump, a motive for the 20-year-old shooter’s actions has not been identified, the FBI said — but authorities are learning more about the suspected gunman, as well as the days and moments leading up to the shots being fired.
In 2016 the Trump campaign built a database profiling millions of voters in key battleground states – including the family of Trump’s would-be assassin Thomas Crooks.
It found that both the parents of Thomas Crooks were very likely to be gun owners and shared other gun-related lifestyle indicators.
From the details that have come out about him already I would be surprised if he wasn't referred as that before. It is actually a pretty common "nickname" for kids that don't fit in even when they don't have hunting as a main personality trait already.