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README.md

@@ -23,7 +23,7 @@ size_categories:
 
 A clean, queryable DuckDB database built from ICE enforcement data published by the [Deportation Data Project](https://law.ucla.edu/academics/centers/center-immigration-law-and-policy/deportation-data-project) (Berkeley Law / UCLA) via FOIA litigation.
 
-**22,030,619 rows** across **6 tables** covering ICE arrests, detainers, detentions, removals, and custody decisions.
+**23,568,538 rows** across **6 tables** covering ICE arrests, detainers, detentions, removals, and custody decisions.
 
 Combines two FOIA releases:
 - **2023 release** (FY2012-FY2023): arrests, detentions, removals, RCA decisions
@@ -68,12 +68,12 @@ DuckDB uses HTTP range requests, so only the pages needed for your query are dow
 
 | Table | Description | Rows | Cols | Sources | Date Range |
 |-------|-------------|------|------|---------|------------|
-| `detentions` | Detention stays (book-in to book-out) | 9,288,543 | 63 | release_2023, release_2026 | 1995-08-31 to 2026-03-11 |
-| `removals` | Deportation/removal records | 3,680,770 | 46 | release_2023, release_2026 | 0212-06-29 to 2023-10-21 |
+| `detentions` | Detention stays (book-in to book-out) | 9,834,781 | 41 | release_2023, release_2026_08 | 1995-08-31 to 2026-08-06 |
+| `removals` | Deportation/removal records | 3,868,035 | 43 | release_2023, release_2026_08 | 0001-09-10 to 2026-08-05 |
 | `rca_decisions` | Release/custody assessment decision history | 3,543,467 | 42 | release_2023 |  |
-| `encounters` | ICE encounters with individuals | 2,586,515 | 24 | release_2026 |  |
-| `arrests` | ICE administrative arrests | 2,334,315 | 32 | release_2023, release_2026 | 2011-10-01 to 2026-09-17 |
-| `detainers` | Detainer requests issued to jails/prisons | 597,009 | 76 | release_2026 | 1989-09-25 to 2027-01-12 |
+| `encounters` | ICE encounters with individuals | 3,065,104 | 23 | release_2026_08 |  |
+| `arrests` | ICE administrative arrests | 2,516,550 | 25 | release_2023, release_2026_08 | 2011-10-01 to 2026-08-06 |
+| `detainers` | Detainer requests issued to jails/prisons | 740,601 | 45 | release_2026_08 | 0002-06-14 to 2026-08-05 |
 
 ## Key Features
 
@@ -103,6 +103,33 @@ Full source code, build instructions, and example queries: [github.com/ian-nason
 
 # Changelog
 
+## 2026-09-14 — Data refresh (Deportation Data Project release of 2026-08-21)
+
+- Rebuilt from the DDP's August 2026 ICE release (activity 2022-10-01 through
+  2026-08-06), which is cumulative and fully supersedes the March 2026 and
+  December 2025 releases. Total rows 22,030,619 → 23,568,538: `arrests`
+  2,516,550 (release_2026_08 share 891,675), `detentions` 9,834,781,
+  `removals` 3,868,035, `encounters` 3,065,104, `detainers` 740,601,
+  `rca_decisions` 3,543,467 (unchanged, release_2023 only).
+- `data_source` for the current release is now `release_2026_08`; the value
+  `release_2026` no longer appears.
+- New in the source: `arrests.city` (and `county`) for the 2022-10+ window
+  (31% populated). ICE did not include `apprehension_type` in this release.
+- Fix: the exact whole-row dedup of `encounters` (12,419 rows here; 12,097 in
+  July) is now part of the build instead of a one-off repair, and validation
+  asserts zero exact duplicates, view/arrest row parity, no negative
+  durations, and that no superseded release remains.
+- Harmonization: `Anonymized Unique Identifier`, `Stay Book Out Date Time` and
+  `Detention Book In Date Time` headers now map onto `unique_id`,
+  `stay_book_out_date` and `detention_book_in_date` (the July build carried a
+  separate, mostly-null `stay_book_out_date_time` column).
+- Builder recognises the DDP's abbreviated file names (ARS/DPR/DET/ENC/REM);
+  `scripts/download_releases.sh` fetches both releases from their box.com
+  links. DuckDB memory capped at 4 GB / 4 threads; `publish_to_hf.py --card-only`.
+- Caveats unchanged: `unique_id` never links across releases; `detentions` is
+  facility-segment level; DDP continues to flag the removals data as less
+  reliable than the July 2025 release.
+
 ## 2026-07-06 — Full refresh + data-quality audit
 
 Rebuilt from the Deportation Data Project's 2026 FOIA release (data through