http://www.modernghana.com/movie/4715/3/queen-of-death-sandra-deliberately-spreading-aids.html Yeah, it's pretty fucked up what happened to her but I don't think that justifies the spreading of a deadly disease intentionally.
sadly, that's been done before too. That's why you always wear a condom with strangers. Similar line of thought, I was at work and a friend sent me this link. It was during the presidential election, and the link was searching the FBI website for the phrase "I'm going to llik(not backwards) barack obama" Suffice to say i shit bricks! he explained "Hey man, someone else did it to me, so I thought i'd be funny." Same mentality as "well if everyone had herpes then nobody would care!"
Sometimes very bad things happen to very bad people, and she's as bad as they come. Left to continue her despicable serial murders, she could easily cause the deaths of many millions of innocent people. Quite a solid arguement for the occasional use of the death penalty.