According to CBS Pittsburgh, 28-year-old Joseph Jackson brought two posters to the concert. One read "I luv you" but the other was emblazoned with the message "Taylor Swift is with Satan."

Turns out that Jackson had also written some questionable Facebook posts that were perceived as threats to Swift. Those combined actions led to his arrest during Saturday's concert.

When police asked Jackson about the Facebook posts, CBS reports that he became agitated. He also apparently told arresting officers, "Taylor Swift is Satan and that 6,000 years is six days and death comes on the sixth day, so Taylor Swift is in danger."