>> now, i didn't think that you could spend time in jail for poisoning people and come out and be a physician. but boy, i was wrong. because that's exactly what he did. >> it is a chilling violation of trust as a doctor, swango had easy access to both poison and patients. >> look at this guy. keep your eyes open. don't turn your back on him. >> i think as long as he was in a medical facility, he was going to kill people. >> swango injected something into her iv bag. and she felt this intense pain through her body, and she could barely move. >> my father's death was not natural causes. >> he was telling us there was a doctor that went by his room every single night, pointing at him saying "you're next." >> this wasn't some mercy killing. he took joy in not just killing folks but telling their families they died. >> this was a person who was dangerous. >> he skirted right under the