I'm Buzz Lightyear - TO INFINITY AND BEYOND!

An evil scientist releases a new biochemical into the water supply of a large city intending to kill millions of people.
However, this chemical, when diluted turns out to be a harmless cure for cancer and countless lives are saved.

Did he do the right thing? Why/why not, motivate!

hmm, that's a hard one.
If you think about it at start, you know it's wrong but then if it saves people by being a cure for cancer. I don't know. I guess at start it's wrong because it kills people to get to the cure. But if it kills a few people to save a million people. So I think it's right and wrong. It would be better if they could find a cure without any people get killed and save a millions lifes. You should'nt have to take another life to save another. It must be a better way. So in this case I think it's good that they find something good out of a mistake but it shouldn't be that way. It's wrong just because other people dies until you get the cure