That would be for a court to decide! Is there an annotation in the margin of the death certificate giving any further (but brief) information? Initially there would probably have been an inquest, then, if it was an unlawful killing there might have been a trial - if a suitable suspect could be detained. There sometimes is. Both of these would have been in the local papers, but that will require a little searching - though you have at least got a date! Good hunting!
Roger