http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2005/01/21/BAG74AU3GU1.DTL
Henry K Lee
"Under the policy, police won't respond to burglar alarms unless a resident, property owner or alarm company employee can show evidence that a crime occurred, such as glass breakage or seeing a suspicious person. Officers, however, will still respond to panic, duress and robbery alarms. "
