While I’m on the subject of the LAPD Cop Shop Files, let me see if there’s anyone among the Daily Mirror Brain Trust who is familiar with LAPD case numbers. It seems that after many years of following the protocol “DR 65 (year) 123-456” that the LAPD made a switch in middle of 1983 to the following system: “DR 83 (year) 01-23456.” Is that correct?

Also, it appears that case numbers are not necessarily chronological. Were case numbers assigned in blocks to different divisions or allocated somehow other than chronologically?

Finally, I find that some cases have a DR number or a PC number and that some cases have both. For example, a 1976 case could be DR 76 123-456 AND PC 123 (76). Can anyone explain?

Thanks!