On a Sunday morning following services at Heritage International Christian Church in the Austin neighborhood, the approximately 350-person congregation prepared to hear about a different kind of salvation. Their pastor, Dwight Gunn, stepped away from the podium.Michael L. Gesas, managing partner of Arnstein & Lehr LLP’s Chicago office, stepped forward. Gesas addressed the congregation of the 12-year-old church Gunn helped open. It was October 2013, and the attorneys at Arnstein & Lehr had saved the …