The LAPD SID is the department's memory. The detective asks the questions, but the SID provides the answers—written in lead, blood, and plastic. Would you like a shorter version (e.g., for a story synopsis) or a technical checklist of SID procedures?

When a high-profile shooting erupts in Downtown Los Angeles or a cold case is cracked open in the San Fernando Valley, the headlines name the Robbery-Homicide detectives. But before any arrest is made, before a suspect is even named, the has already done the silent, meticulous work that makes the conviction possible.

In the last five years, the SID has adopted Rapid DNA (results in 90 minutes for booking suspects) and Predictive Geomapping for serial crimes. They have also cleared over 4,000 backlogged rape kits, sending rapists from the 1990s to prison using genetic genealogy.