Brad Yusim was a legit lifesaver.As an associate at Jenner & Block in the early 2010s Yusim, along with now-former firm partner Jeffrey A. Koppy, took on Texas death-row inmate Jimmie Urbano Lucero’s case pro bono.“We spent a lot of time together working on that case,” Koppy recalled. “We’re down in the heart of Texas, not a very sympathetic place to be defending a murderer on death row.”In the beginning, Lucero did not trust the attorneys. But Yusim persisted.“Brad was really …