A very classic case (via techdirt). Nemesysco developed a lie detector that apparently has some problems, which were documented by a report in a technology journal by some Swedish researchers. Rather than debunk their claims, Nemesysco decided to try to silence them with legal action. Oops.
According to the researchers:
It was hardly their intention. But since the article was withdrawn, I have received lots of mail and requests for copies of the article. The article would not have been read to this extent if the company had simply ignored it in silence.
The fact that they jumped right into legal action rather than trying to set the facts straight tells me that the technology journal probably has the right story.