With the caveat that I'm sure there are loads of aspects of the court case that weren't even touched on in this dramatic retelling - based on what they showed I don't know whether they did it or not but there's surely no way a jury could be beyond reasonable doubt about it?
@Quarantino I agree with this. For me the dodgiest bit of evidence is the tape which was edited by the company and they admitted the coughs were enhanced.
Gut instinct would tell me they were guilty but if I was on the jury I think I would have said not guilty because I really don't think they proved it beyond reasonable doubt. Not from what they showed on the drama anyway.