Here's the person Ehrman references about the forged letters:
Diotimus the Stoic - Wikipedia
According to that report, Diotimus was put to death as a result of the lawsuit of Zeno the Epicurean. Ouch! Too bad there aren't more details on all that.
PS
Who Is Diotimus? An Introduction To The Man Who Made An Extraordinary Mistake
INTRODUCTION Of the Ancient Stoics, we know the least about Diotimus. He lived sometime around the early-first-century BC, and he might have known the…
dailystoic.com