Archer Heights other larceny is the lead signal for September 2025, a fresh spike with no prior months at the top of the rankings. The category is not isolated to one neighborhood — Hyde Park and Hegewisch both registered other-larceny spikes as well, making it the most broadly distributed fresh move this briefing.
Citywide volume is down 11.4% against the prior 12 months — 133,693 incidents against 150,936. That decline is the backdrop for a mixed signal picture: 99 sustained-shift signals and 77 zero-event signals dominate the 204 total, but 13 fresh spikes are present, including motor vehicle theft in East Side and a robbery spike in Fuller Park alongside the larceny cluster.
The other-larceny pattern across multiple neighborhoods is new this month — lead run length is 1, so there is no multi-month streak to cite. Whether the category concentration holds into October or dissolves back into the baseline is the main thing to watch. The broader structural trend, an 11.4% year-over-year decline, remains intact.
Sustained drops worth naming
Robbery ran below trend in the trailing 12 months — 33% down from the year before. Sustained shifts often precede a baseline reset; we surface them at the same prominence as spikes.
Public Analyst.ai, “September 2025 — Chicago,” archived snapshot.Permanent URL: /chicago/2025/september