As I said in another thread where you asked, prior to retiring, I owned a company that had a police officer on staff full time, he currently works for the Villa Park, IL PD and is also the DuPage County Homeland Defense liason officer; he provided me the data, it was not on-line and I no longer have the documents since I cleaned out my desk last fall and didn't really think to keep them. It does not make it any less true.
I think the .38 Special has killed more people than any other cartridge. It is the most abundant.