Federal Releases from BOP
The Bureau of Prisons is a nationwide federal-prison system. It is not a San Juan County facility, not a Colorado state-prison locator, and not a county jail roster. Use it when the release path points to federal custody: a federal sentence, U.S. Marshals hold, federal warrant, federal transport, or a county release entry showing that local custody ended because another federal agency took custody. A person released from BOP does not become searchable through San Juan County Jail merely because an earlier arrest or hold touched San Juan County.
BOP's locator covers federal inmates incarcerated from 1982 to the present. The BOP records guidance says the database contains information about federal inmates released after 1982, that it is for federal inmates only, and that many older pre-1982 records may require National Archives research. The locator may show a release date or current/former federal location, but BOP also warns that release dates may change as sentence calculations and First Step Act recalculations are reviewed.
If the San Juan County event was only a local booking before a federal transfer, the county record can still matter. It may show the date local custody ended, the federal hold or transport notation, and the agency that received the person. But the federal sentence, federal release date, and federal facility history belong to BOP and federal court systems. CDOC should not be used for a federal sentence, and BOP should not be used for a Colorado state-prison sentence.
How to Search BOP
The BOP Inmate Locator can be searched by identifying number or by name. Federal identifying numbers may include a BOP register number and, where applicable, DCDC, FBI, or INS numbers. A name search can use first and last name with additional filters shown by the BOP interface. Because federal records are nationwide, careful matching matters. Check age, race, sex, register number, release date, and listed location before treating a result as the correct person.
- Open the BOP Inmate Locator at https://www.bop.gov/inmateloc/.
- Search by register number or another official number if known.
- If no number is known, search by name and compare age, sex, race, location, and release date.
- Read any release date as a federal custody date, not as a San Juan County Jail release date.
- Use BOP's federal-inmate-records guidance for records after 1982 and National Archives routes for older federal records.
- Use the federal court docket for sentence and disposition context when the locator does not explain the case outcome.
For the broader local chain, use the San Juan County released inmates search path first. The local jail or court record may identify whether the person was released to a federal hold. Once that is confirmed, BOP is the release-date lookup for the federal sentence.
BOP Records and Locator
The research identifies two core BOP routes: the Inmate Locator and the "About Federal Inmate Records" page. The locator is the public search tool. The records guidance explains the 1982-forward coverage and the limits for older records. BOP records are federal only. They do not contain San Juan County booking photos, local jail release reasons, local bond status, Colorado probation orders, or Colorado state-prison release calculations.
When a San Juan County Jail release entry says "USMS," "federal hold," "federal warrant," or similar language, the local release should be read as the end of county custody. It may not be community release. The next step is the federal agency or BOP path named by the record. If the person was only briefly held locally and then moved into federal proceedings, use the federal court docket along with BOP for the sentence and release timeline.
Federal Bureau of Prisons facilities nationwide
Nationwide federal prison system
Locator: https://www.bop.gov/inmateloc/
No local BOP facility identified in San Juan County
Federal sentence and federal release-date path
No Local Federal Prison Identified
The facility map found no federal prison in San Juan County. That absence should not be overread. A small county can still have arrests, holds, warrants, or transports connected to federal cases without hosting a federal prison. The right question is not whether the federal facility is local. The right question is whether the custody path changed from county jail to federal custody. If it did, BOP and federal court systems become the release-record path.
Federal release research should also be separated from immigration custody. Some older or cross-system records may use abbreviations that confuse readers, such as INS in historical identifiers, federal hold language, or immigration detainer language. BOP is for federal criminal sentence custody. ICE's Online Detainee Locator is for immigration detention. If the San Juan County release record names ICE or immigration detention, use the ICE / immigration detention system page instead of BOP.
What BOP Does Not Prove
A BOP locator result does not prove the person was released from San Juan County Jail. It proves a federal custody record if the match is correct. To connect a San Juan County event to a federal release, line up the local booking or court record with the federal case and BOP result. The county record may show the local release or transfer date. The federal court record may show sentence and commitment. The BOP record may show federal location or release date. Each answers a different part of the timeline.
If a person does not appear in BOP, that does not prove there was no San Juan County arrest or no federal case. The person may have had a state case, a local jail release, a pretrial federal situation outside BOP sentence custody, a pre-1982 federal record, a name variation, or another identifier. Work back through the sheriff, San Juan Combined Courts, CDOC, BOP, and ICE according to the custody type named in the records.