Louisiana police say a podcast helped them solve the decades-old killing of a 16-year-old girl and announced Friday that four men now face criminal charges in connection with her rape and murder. In 1982, teenager Roxanne Sharp was killed in the woods of St. Tammany Parish, about 30 miles north of New Orleans. Police struggled to solve the case due to a lack of evidence and witnesses willing to come forward. But then, investigators approached a local media company, which agreed to produce a podcast, “Who Killed Roxanne Sharp?” renewing public interest in the case after its six-part series aired last year. Roxanne Sharp — here in Covington, Louisiana in 1980 — was raped and murdered at age 16 in 1982. AP Louisiana State Police spokesperson Marc Gremillion credited the podcast with generating crucial tips from the public and prompting new witnesses to approach investigators.…