in summer 1968 ... an employee of the Florida Bell Telephone Company illegally monitored Engressia's telephone conversations and divulged them to the FBI
Nothing about the employee being charged, either. But at least law enforcement was able to raid his house to get a malicious mischief charge.
Those interested in his story may also like "A Call from Joybubbles"(2017) produced by Jeremy Grange for BBC Radio 4
https://www.bbc.co.uk/programmes/b08hlnjq [audio, 28 min].
I imagine this person is the reason that David Strathairn's personage in Sneakers (1992) is called Whistler.