Active records requests only. Resolved / ruled-out items in the reference section below.
SUBPOENA & RECORDS-REQUEST PRIORITY LIST
🔴 CRITICAL — issue or follow up within 7 days
1. Arizona Game & Fish Department — European hunter cross-reference (NEW LEAD)
Director-level request for a cross-reference of European nationals (or persons of European origin) who obtained Arizona hunting tags in the 2023 and 2024 hunting seasons in Game Management Unit 10 (GMU-10, Kaibab National Forest) and adjacent units. Scope: tag type, hunter identity, contact info, hunt dates, and any encounters with forest rangers or other tag holders. Goal: identify potential finder(s) of Chelsea Grimm's iPhone X in the Kaibab forest.
The iPhone X activation event of 2024-05-17 showed foreign ICCIDs and source IPs in Canada and the United Kingdom. EU privacy regulations have blocked IMEI-based device tracking software from returning data on the foreign SIMs. A European hunter with physical access to the search area is a plausible finder of a phone abandoned in the Kaibab after Chelsea's disappearance. This is the most promising lead for identifying who has the phone.
Search Investigations outreach initiated 2026-04. AWAITING DIRECTOR'S RESPONSE.
2. T-Mobile US — Attach / registration activity for IMSI
310260... and IMEI 359408082931975 (NEW CRITICAL PRIORITY)Whether the IMSI beginning
310260 (the U.S. identifier pulled from the 2024-05-17 Apple iOS Device Activation sheet for Chelsea's iPhone X) was ever active on the T-Mobile network; whether that IMSI corresponds to a real T-Mobile subscriber account, a roaming partner profile, or some other type of network identity; the IMEI(s) the IMSI was used with; the ICCID associated with the IMSI; dates/times of any registration, attach, or activation activity; whether the profile was physical SIM or eSIM; tower / area / session data to the extent retained; and any subscriber / billing information if the profile maps to a real T-Mobile account. Specifically: confirm whether IMEI 359408082931975 (Chelsea's iPhone X) shows up in T-Mobile network logs.Technical analysis (2026-04-11) confirms the U.S. carrier code on the Apple activation sheet is T-Mobile US (MCC/MNC 310/260), NOT Verizon as earlier case notes indicated. The iPhone X requires a PHYSICAL nano-SIM (no eSIM support), so the 2024-05-17 activation required someone with hands-on possession of the phone to insert a SIM. The observed pattern — constant ICCID, 124 IMSIs across 61 countries under one timestamp with no time gaps — points to a multi-IMSI / programmable / travel SIM (likely A1 Slovenia roaming onto T-Mobile as its US partner). T-Mobile as the visited network is the highest-probability DOMESTIC subpoena target and may hold attach records, tower data, and IMEI correlation. See
09_Working-Notes/cell-phone-sim-analysis_2026-04-11.md.SIM Report (2025-10-10); cell-phone-sim-analysis_2026-04-11.md; CCSO Watson Supp 0038.
3. Apple Inc. — Continuing iPhone X activation records (post-2025-08-21) + source-IP detail
All iOS Device Activation records, account sign-in records, iCloud sign-in records, and Find My iPhone re-enable events for IMEI
359408082931975 / Serial C38VM2NEJCL8 from 2025-08-21 forward (continuing). Also: Apple-side definition of sim_policy_name = CYPRESS and any partner/distributor records associated with that policy. ALSO: the literal source IP addresses logged against each 2024-05-17 activation event (to classify them against Apple-owned relay ranges 17.0.0.0/8 and 2620:149::/32, known VPN ASNs, hosting/CDN ranges, or ordinary residential/mobile ISP).Continuing activity since CCSO's GJ subpoena cutoff of 2025-08-21 could refresh the location and identity of whoever has the phone. Classifying the literal UK/Canada IPs would determine whether the 2024-05-17 activation was routed through a deliberate VPN/proxy, Apple's own relay infrastructure, or an imprecisely geolocated residential ISP — the distinction matters for interpreting intent.
Prior subpoena (GJ-010-2025) covered through 2025-08-21. This is the continuing-records request. SIM Report (2025-10-10); CCSO Watson Supp 0038; cell-phone-sim-analysis_2026-04-11.md.
4. Coconino County Sheriff's Office — Helicopter footage from 2023-10-06/07 initial SAR
All helicopter / aerial footage captured during the CCSO SAR operations in the Kaibab National Forest on 2023-10-06 and 2023-10-07 (the days following Chelsea's vehicle discovery). Include metadata: flight paths, altitudes, timestamps, camera operator notes.
Critical for verifying whether a blue shelter (matching the one visible in Chelsea's backpack in her Instagram story) or a person was present on the ridgeline above MK Tank (35.37961, -112.38696) during the initial search. Would corroborate (or refute) the 2023-10-20 drone sighting that is believed — but not confirmed — to be Chelsea. If the shelter was present Oct 6-7, the Oct 20 drone hit is likely hers; if not, the Oct 20 blue shelter may belong to someone else.
Requested by Search Investigations. CCSO RESPONSE: No footage available. CCSO indicated they do not have helicopter/aerial footage from the 2023-10-06/07 initial SAR. Item retained on list as an unresolved corroboration gap.
5. CCSO — DNA results + 2023-10-18 touch swabs and fingerprints ✓ RESOLVED
Covers BOTH: (a) the parental DNA submitted by CCSO Det. Meyer on 2025-04-22 from Stephen and Janet Grimm for CODIS familial entry, results received 2025-07-15 (Supplement 0037); AND (b) the 2023-10-18 CCSO touch swabs and fingerprints collected from Chelsea's vehicle by Det. Luna (steering wheel, rear-view mirror, seat belt, front door handle, emergency brake, gear shift, engine start button, volume button).
RESULT: Tested — NO FOREIGN DNA FOUND. The touch swabs and fingerprints have been processed and returned negative for any third-party DNA. The parental/CODIS familial entry has not produced a hit. This closes out both the "untested swabs" concern and the "unreleased DNA results" concern with a single finding: nothing third-party-attributable was recovered from the vehicle.
CCSO Grimm Report 2025-10-24, Supplement 0037; user confirmation 2026-04-11.
6. Cellebrite forensic extraction — recovered devices
Forensic extraction and analysis of Chelsea's recovered devices: iPhone SE (serial FFWCQ16PPLK1, found inside the vehicle), laptop, iPad.
Full content extraction may surface communications, photos, location data, and app history not yet available in the case file.
Pending per Search Investigations work plan.
🟠 HIGH PRIORITY — issue within 30 days
7. A1 Slovenia — Diplomatic inquiry (NOT a US-enforceable subpoena)
Diplomatic / voluntary-cooperation inquiry to A1 Slovenia (Slovenian mobile operator owned by A1 Telekom Austria Group — the correct carrier, replacing earlier case references to "Telekom Slovenia" or "Slovakia") requesting subscriber identification for any IMSI observed in the 2024-05-17 iPhone X activation event whose MCC prefix matches Slovenia (293). Cross-reference against the 2 known ICCIDs (8938641090306391573 and 8914801090306391573) and any A1-issued multi-IMSI or travel-SIM products. Note: iPhone X has NO eSIM support — any A1-issued SIM presenting on this device had to be a physical nano-SIM physically inserted.
Technical analysis (2026-04-11) identifies the foreign carrier in the activation data as A1 Slovenia, not Telekom Slovenia. An A1 Slovenia SIM roaming onto T-Mobile US is the leading interpretation of the observed multi-IMSI pattern. ⚠ IMPORTANT: EU privacy regulations and jurisdictional limits mean a US subpoena is NOT enforceable against A1 Slovenia — this must be a diplomatic / voluntary inquiry, not a formal subpoena. The existing 2025-09-29 outreach email (originally addressed to Telekom Slovenia) should be updated and re-sent to A1 Slovenia.
cell-phone-sim-analysis_2026-04-11.md; 2025-09-29 outreach email (existing, to be revised); SIM Report 2025-10-10 enumerates the 61 MCCs.
8. Meta Platforms (Facebook) — Full login log for Chelsea-Belle McGrimm (SUPPLEMENT existing PDF)
Complete IP address and User-Agent log of all sign-ins, sign-outs, password changes, and recovery actions for the Facebook account at
facebook.com/Chelseabelleism from 2023-09-22 through 2024-03-19. Also: device identifiers and email/SMS recovery confirmations. Note: Search Investigations already holds the 2024-05-17 FB Activity Log "Unrecognized Activity Highlighted" PDF and is actively reviewing it — this request is to obtain Meta's fuller server-side log beyond what is already in the exported activity PDF.Identifies the unknown party who used Chelsea's Facebook account during the Feb 23 → Mar 18 2024 window (bot-spam page likes), 23 days BEFORE the PI team's documented account takeover on Mar 19. The existing activity-log PDF shows the what; a Meta subpoena would provide the from-where (IPs, devices, session tokens).
2024-05-17 FB Activity Log PDF (in possession, under review); 2025-09 social media consolidation analysis.
Source documentation for each item is in the LaCie case archive. The authoritative working analysis is in data/reports/Chelsea_Grimm_Case_Analysis.md. Portal: Home · Key Insights · Briefing.