A: Generally speaking, a detainer is a type of hold where one jurisdiction, such as a local county, has untried criminal cases against an offender who is currently incarcerated in Department of Corrections (DOC). The jurisdiction in question will obtain and issue a "detainer" instructing DOC to release the offender to their custody upon release, instead of releasing the offender to Community Corrections.
However, there are some untried detainers that are considered minor, such as misdemeanor detainers, which in some cases will allow the offender to parole to Community Corrections, upon their projected release date, where the minor detainer will be resolved.
In many cases, an untried detainer may be resolved while the offender is still incarcerated within the DOC, and in some of those cases, a prison sentence from the trial may be ran concurrent with the offender's current incarceration. If so, the offender may be released from DOC upon their projected release date to Community Corrections—because the detainer was resolved prior to their projected release date.