Painful, sore, red gums can be a symptom of gingivitis (inflammation of the gums) or, more likely, periodontitis (inflammation of the attachment fibers of the teeth and supporting bone), which can arise due to a number of different causes.
klick (plural klicks) ( 1 slang, military) A kilometer. 2002, Robert J. Sawyer, Hominids an asteroid between one and three kilometers wide had slammed into the ground at fifteen klicks per second. ( 2 slang, usually in the plural) Kilometres per hour.
I was able to find the meaning of snitching in less than ten clicks of my mouse, so I think it's safe to assume that 60 Minutes, a national news program with a budget and research staff, is aware of the nature and definition of snitching and had no interest in being fair and accurate.