Peiter Zatko

The subpoena was delivered on Thursday and publicly filed on Monday.

who is defending against a Twitter lawsuit (TWTR).

More spam and fraudulent bot accounts than Twitter (TWTR) makes public.

In October, the matter is scheduled to go to trial.

In the revelation, Zatko asserted that Twitter's estimate of the amount of spam is inaccurate.

The new subpoena is yet another indication of how Zatko’s claims could impact the case.