If they really believe he committed suicide, then, no, they don't want it dragged up forever, photos published, etc. I can even see wanting it to be a suicide in the face of niggling doubts (not that I'm saying they have them) but if he killed himself, the evil that killed him died with him. If he didn't, it lives on, victorious. That may be unfaceable for them.
Mrs VS
Here's a mountain of evidence that he did not commit suicide. More than a niggling doubt and they insist on it being a suicide in spite of it. No, something's wrong here. Sheila Anthony (Foster's sister) was very closely inside the evil clinton administration and was probably told some plausible story (something heroic that Vince did or something like that and it needs to be kept quiet) by them other than suicide and Lisa Foster has probably been threatened. That's what I think is going on here.