Steve Fishman talks with Harry Siegel about his his new podcast, The Burden, where he speaks with and digs into the history of former NYPD super-cop Louis Scarcella, the detective who locked up New York’s baddest guys back in the city’s “bad old days” — and with the convicted murderers turned jailhouse law firm who won their freedom by digging into police work that sometimes seemed, as journalists will joke, too good to check.