Hall County's jail is the first law enforcement agency in Nebraska to stop honoring federal "immigration detentions", making the move in fear of being sued.
Other Nebraska counties may follow suit, thanks in part to efforts by civil rights organizations.
The 48-hour immigration detainers are issued to local law enforcement by the U.S. Immigration and Customs Enforcement agency. They ask that immigrants who have been arrested be held for two days after they would normally be released to give federal officials time to initiate an investigation and take the person into custody for deportation, if necessary.
The practice is under scrutiny, and several agencies around the country have stopped complying with the requests.
Hall County jail director Fred Ruiz said the move followed consultation with attorneys for the county and its insurance carrier.