User blog comment:Ltmaroon57/Maybe Summer Is Alive?/@comment-4010415-20180831005902

To be honest, "never came back" or "didn't come back" is often used in fiction as a euphemism for "died". Even if they found Summer's body and brought it back, technically Summer herself didn't come back. Know what I mean?

"Dealt with" also tends to be a euphemism for "killed" in fiction. Hell, even the first My Little Pony: Equestria Girls movie used it. During the movie's climax, Sunset Shimmer becomes corrupted by her selfish use of the Element of Magic and transforms into a demon, and she ends up saying "Twilight has tried to interfere with my plans one too many times already! She needs to be dealt with!" before launching a fireball directly at Twilight in an attempt to kill her.

As for why Hazel didn't say a specific name, I always got the impression that he was referring to more than just one SEW, as if Summer wasn't the first SEW that Salem's group has "dealt with".