Eight days before the crime was committed Koopman had been vaccinated against smallpox and inoculated against typhoid, cholera and tetanus.  THE BRAINS OF THE INOCULATED Speech by LILY LOAT
CLAYTON'S STORY (DPT, MMR vaccines)
Vaccination and Social Violence--Harris Coulter
Vaccination and Violent Crime--Harris Coulter
Barbara Fisher and I wrote DPT: A Shot in the Dark, I didn't realize how
dangerous the vaccine was. This book had an interesting affect on public policy.
The Congress read it and they passed a law on compensation to families where
there had been some child suffering from the vaccination and to this day, that
program has paid up to 700 million dollars to families who have suffered from
vaccine damage. Now there are about 3 to 4 billion dollars in claims in the pipe
line. When we finished the book I realized there was a lot more material left
over so I wrote a second book called, Vaccinations and Social Violence and
Criminality, published in 1990.
That book deals with the long term effects of vaccinations on the emotional life and psychological stability. . It's not a difficult conclusion. Vaccination does cause encephalitis, the doctors admit that. Encephalitis does have as one of its many sequelae, violent behavior. All one has to do is read the literature and it is evident that vaccinations are causing this epidemic of violent behavior. I haven't had any luck in persuading the allopathic physicians of that but I hope to one day before its too late. Harris Coulter Interview