>> lillian liao: at least half. >> pelley: this is ryland's e.r. x-ray. >> liao: you see the two bullet fragments that are in him. >> pelley: the x-ray shows you the solid fragments of the shrapnel and the bullets, but it doesn't tell you much about the damage to the soft tissue. >> liao: no, and it doesn't tell you what's on the inside. i mean, a bomb went off on the inside, and our job is to go in there and clean it up. >> pelley: a bomb went off on the inside because of the shockwave from these high- velocity rounds. >> liao: correct. >> pelley: ryland endured 24 surgeries to repair his arm leg, pelvis, intestines, kidney bladder and hip. >> liao: at some point, it's like putting humpty dumpty back together again. >> pelley: what do you mean? >> liao: well, his organs are now in different pieces, and you have to reconstruct them. the arm was missing soft tissue skin, muscle, and part of the nerves were damaged. the bowel has to be put back together. some of the areas of injury has to heal itself, so you can see that he can walk around like a norm

lillian liao treated them. >> when a high-velocity firearm enters a body, it basically creates a wavend a blast. so it looks like a body part got blown up, simply put. and so there's a lot of tissue that's going to go missing, that we cannot put back. >> reporter: sadly, it was not her first time treating victims of a mass shooting. she was on the front lines when a gunman opened fire inside a church in sunderland springs, texas, killing 26. >> the time where we responded to sutherland springs, i wasn't a mom. and this time, i am. i was grateful to be able to go home and hug my children. and also felt a little guilty that i was able to hug my children. and that i knew there were parents who couldn't. >> reporter: uvalde is a small texas town of 16,000 residents 80 miles west of san antonio. it's a place where just about everybody knows everybody connected by blood or proximity. >> the family of these men, communities, horrible killing. i will find time to meet with them. >> reporter: tonight archbishop gustavo garcia's task, as important and taxing as any here. make sense of the sense