Fitness influencer and fraudster “Liver King” was arrested in Texas after posting a series of bizarre social media videos, one in which he challenged Joe Rogan to fight as he traveled to the popular podcaster’s home state. Brian Johnson, 47, known across social media as the “Liver King,” faces a misdemeanor charge of making a terroristic threat and was booked into the Travis County Jail in Austin at 8:31 p.m., online records show.