He owns the company.
He needs to spend a few years in prison. The SS needs to make an example of everyone who thinks it is cool to threaten to assassinate the president or the president elect.
Harrigan's threat was a lot worse that this punk. Harrigan said exactly how he was going to do it.
If they arrested this punk, then they need to arrest Harrigan.
The article mentioned that the tweets had been reported by the company to the authorities.