How can I delete someones response?

This post http://groups.google.com/group/alt.h...7fcd2fc0162e81
needs to be deleted, it is on the first page search engine results
http://www.google.com/search?source=...owell+services
for the site I put together, John Hoskins wrote:

"I think ............. is not a serious company, and the
site is part of the get-rich-quick scheme of the owner. I'd buy my
gutters elsewhere."

The Rowell's are licensed and insured and are no way a scam, I thought
this group was for constructive criticism not defamatory remarks.

John if you read this please remove the defamtory content of your
critique.

nshiflett (AT) gmail (DOT) com wrote:

This post http://groups.google.com/group/alt.h...7fcd2fc0162e81
needs to be deleted, it is on the first page search engine results
http://www.google.com/search?source=...owell+services

But then, so are Ron Rowell CPA Services in Oregon and Rowell's Septic
Service in Hew Hampshire.

for the site I put together, John Hoskins wrote:

"I think ............. is not a serious company, and the
site is part of the get-rich-quick scheme of the owner. I'd buy my
gutters elsewhere."

The Rowell's are licensed and insured and are no way a scam, I thought
this group was for constructive criticism not defamatory remarks.

John if you read this please remove the defamtory content of your
critique.

Dear Nate

Well, this *is* unfortunate. You asked for comments and I provided my
estimation. I spent a lot of time reviewing your site, and posted my
conclusions right here on Usenet, as you requested. One of my suspicions
was that the company was not even real, or was real but not so honest.
That such a conclusion can be drawn from a website is important feedback
about the website, I hope you would agree.

In any case, I can't (and, as respectfully and mildly as I can say it,
won't) retract that that's what I thought. It really was my suspicion.

The main problem is that you've come to complain a full month after I
posted. If it bothered you, why did you wait so long? There's no message
left on my server to cancel. The entire thread's expired. What you're
seeing is Google's archive of the discussion you initiated. There may be
other archives elsewhere in cyberspace. I have no influence on any of
them. It's way too late.

You said you wanted constructive criticism. I provided my offering as
you requested. I'm sorry it's not what you wanted to hear.

BTW, I notice that you seem to have made only one change in light of the
critiques and numerous suggestions you were provided. I'm wondering why
that is.

Also, to answer the question you asked in your title, if not in your
post: you generally can't delete somebody else's post. It used to be
possible, I believe, if only on certain servers or in certain groups,
but that was before my time. I know I can cancel my own posts within a
week (or, uh, something like that), but GoogleGroups (and others) might
slurp up copies for their archives before I do it. I don't know that a
cancellation affects Google's archives.

Good luck to you nevertheless.
--
John