Here is the exact link for the SF Police crime website: http://sf-police.org/index.aspx?page=1618
You can also use crimereports.com
Another good idea is to contact the local precinct of wherever you want to rent/buy to get the context behind the stats.
Lance King/Owner-Managing Broker
Licensed Associate Broker
Accredited Buyer Representative
GREEN Designated Agent
William Raveis Legends Realty Group
Gregory Bryan JD/MBA
Let me know if I can be of further assistance.