san antonio and then come back to an address in austin. so this city definitely on edge, as this investigation unfolds. katy? >> no doubt about that. gabe gutierrez in austin. and retired fbi profiler, candice delong, guys, thank you very much for joining us. now to breaking news in great mills, maryland, where two high school students are wounded after a classmate opened fire. this shooting happened before classes began in great mills high in southeast maryland. the male gunman walked into the school and shot a 16-year-old female student and a 14-year-old male student. the shooter is now dead. just a couple of days ago, students at this high school participated in the national walkout, protesting gun violence. and here is how one witness from that school described the chaotic moments to my colleague, hallie jackson, earlier today. >> we were just standing there talking and we heard like a loud shot. and it was probably like a few yards away from us.