In the book "ring of death" (I think), it talks about Vince trying to cover it up
This is the only quote I could find real quick, but there's a longer explanation in there. Either Vince or another WWF official tried to play up Snuka's gimmick and act like he couldnt speak English or be held accountable
Muchnick also exposes a little-known story about wrestler Jimmy Snuka, who in 1983 took up with a 23-year-old groupie; she wound up dead at an Allentown, Pa., hospital from “undetermined craniocerebral injuries.” Snuka was never charged with a crime, but Muchnick makes a compelling case that the popular wrestler, known as “Superfly,” had battered his girlfriend.
According to Muchnick, in a discussion with an attorney who had considered representing the girl’s family in a wrongful-death suit, McMahon said, “Look, I’m in the garbage business. If you think I’m going to be hurt by the revelation that one of my wrestlers is really a violent individual, you’re mistaken.”