An old article, but the site has to start somewhere:
There have been 54 slayings as of July 11th, up from 45 at the same time last year.
I have 58 murders listed as of July 11th. The Chronicle has been known to be wrong though, and some murders aren't reported at all, such as Sung Park (Homicide #13), a Korean student who was murdered Feb. 4th, during a street fight outside a club on Harrison Street. Nothing on SFgate, though the SFPD had a crime bulletin posted on their website, asking for information leading to Park's killer.