It most certainly was, and may well still be, a very common event in legacy airlines! I know I have been 'nobbled' on several occasions. I have heard crew boasting about doing it when the alcohol takes over and out it pops. It is one step away from insanity to intentionally poison your pilot, but it happens. Those tending to do it are the older, embittered females with a grudge, real or imagined, or the young aggressive 'why are you paid more than me? We all do the same job'-type males with a real problem about 'overpaid pilots'. But that is a complete new subject that is not encouraged.
It has now been over a Month since the event made news, and given that it wasn't an accident, and all the parties are available, it is not unreasonable to expect there might have been either a public or an industry relevant statement on this event by now?
What 'event' needs a 'statement' pray? In airline annals, it is one of the lesser important 'events'. A flight diverted, a crew member left the flight, flight continued, everybody landed safely after a minor 1 hour delay. What more do you need?