A Trumann man is in custody after authorities say he used a blowtorch to set a coworker on fire at a Poinsett County business. Thirty-seven-year-old Joshua Warren Campbell is facing a charge of first-degree battery. A judge found probable cause for his arrest Monday. According to the affidavit filed by the Poinsett County Sheriff’s Office, the incident occurred March 23 at Metal Man Recycling. Investigators allege Campbell used a metal-cutting b…