The 28-year-old crazed fan named Joseph Jackson was caught on his seat at Swift's gig at Heinz Field on July 6, reported Aceshowbiz.
"Taylor Swift must perish and die," he allegedly wrote on Facebook. Another Facebook post read, "I luv you Taylor."
Jackson later attended the concert at Heinz Field and brought several posters with him. One of the signs read, "Taylor Swift is with Satan". The police arrested him after receiving notification from the singer's security team.
"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," he said.
Jackson is currently held in the Allegheny County Jail on trespassing and resisting arrest charges. He will undergo a complete mental evaluation before appearing in front of judge.
In May, a man was taken into custody after he confessed that he swam to Taylor's property in Rhode Island. The obsessed fan, who got out of the water about 1 mile from Taylor's beach house, said that he wanted to see his beloved singer. He, however, decided to swim back after seeing her security team.