Petition here: http://www.petitiononline.com/TScreen/petition.html

In September 2005, following confirmation that Red Lake Indian Reservation
school shooter, Jeff Weise, was under the influence of the antidepressant
Prozac, the National Foundation of Women Legislators, together with American
Indian tribal leaders, called for a Congressional investigation into the
correlation between psychiatric drug use and school massacres. Congress has yet to investigate the role of psychiatric drugs relating to school shootings despite international drug regulators warning these drugs
can cause mania, psychosis, hallucinations, suicide and homicidal ideation.
At least eight of the recent school shooters were under the influence of such drugs, and according to media reports, investigators working on the Virginia Tech school shootings, Cho Seung-Hui may also have been taking drugs for "depression." Filmmaker Michael Moore has also called for a federal investigation into school shooters and psychiatric drugs (less info)