Black Labrador mix with orange harness, lost in Muncie

Yesterday around 3pm I realized my dog is missing. He's a black Labrador mix, about 65 pounds, wearing an orange harness with a small green reflective strip and a white patch on his chest. We were near Ball State University campus and the Muncie Mall when he slipped a lead and ran off. He’s a rescue who means the world to us and he gets scared around strangers, so I'm really worried and hoping he comes back soon. If anyone found him, please email me at [email protected]; I’d be so grateful to be reunited.