I assume you mean that the harassment/stalking was
allegedly taking
place on Wikipedia. IANAL but I do help prep civil cases, and the
documentation listed below would be the bare minimum of what would be
requested. I don't know about Missouri, but pretty well any court in
Canada would
grant subpoenas for most of these documents.
For the prosecution it would involve the records of the Foundation that
contained information about the editor who carried out the
stalking/harassment (userpages, real names if known, IP addresses and
whatever information is available to checkusers, etc), and any
documentation showing actions taken in relation to the harassment. The
contributions list of the editor, deleted versions of pages, deletion
logs, block logs, and (if applicable) oversight logs are the most likely
to be subpoenaed. All prosecution evidence must (eventually) be turned
over to the defense.
On the defense side, they could well request subpoenas for the names and
identities of editors/admins/checkusers who responded to the harassment
or alternatively elected not to respond to the harassment (again,
userpages, real names if known, and all info available to checkusers).
The defense would probably have to show cause to get this information,
but all they would likely need are printouts of diffs showing the
username and the nature of the intervention.
Either prosecution or defense may request all available personal info on
the alleged victim; they might go after all of the contributions of the
alleged victim as well.
Somebody would probably be subpoenaed to testify on Wikipedia's policy
about harassment and how it is enforced. That could be very, very
interesting.
Risker
The burdens of discovery, testimony, and potential, including criminal,
liability are not the reason to have and enforce a harassment policy. The
best reason is to support our users and make a reasonable effort to
protect them from harassment both on and off site. As one can see from the
case of Megan Meier ([[Megan Meier suicide controversy]]), some people are
quite vulnerable.
Fred