Well we will see what happens in future. I generaly dont trust what media reports, without a insider information. (or mutliple trusted sources say the same thing)
But what happened is Criminal Negligence in some way. Well they didnt hurt people directly, but they did hurt any future people who could use this masks and reduce the virus spread.
In other words, they probaly killed some people that way. But it is realy hard to prove this. So slap on hand pretty much and they may end up with a fine.