Cameron County released a man from custody without restrictions, despite Minnesota's request to extradite him on charges tied to a shooting during a January immigration crackdown in Minneapolis.

Christian Castro walked free early Thursday morning after Cameron County Sheriff Manuel Treviño said his office had no legal choice but to let him go. Castro had been held for 90 days in the Cameron County jail, the maximum allowed under Texas law, without being extradited or given a bond.

"As far as we are concerned, we did not put any restrictions on him. He does not have an ankle monitor or anything like that because that was not on us," Cameron County Sheriff Manuel Treviño said. "Our thing was to release him unconditionally. Now, if later on he receives something in the mail or whatever, that's between him and the state of Minnesota."

Castro is an Immigration and Customs Enforcement officer charged with shooting a man and lying about it during the January immigration crackdown in Minneapolis. He was arrested in May in Harlingen.

Minnesota Attorney General Keith Ellison filed a request for a temporary restraining order last week to block Castro's release or order his return to Minnesota. A federal judge denied those requests on Wednesday, saying extradition laws do not set a deadline for Gov. Greg Abbott to sign the extradition papers.

Abbott had not signed the necessary paperwork to extradite Castro despite multiple requests from Minnesota, according to a lawsuit. Attorneys for Abbott said his office has not denied the extradition and that he ordered the Texas Secretary of State's office to investigate whether Castro was legally a fugitive.

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Treviño said his office was waiting on a ruling from the federal judge but received no other instructions. The Cameron County Sheriff's Office is not tracking Castro's whereabouts, and he is free to leave Cameron County or the state.

Minnesota raised concerns that Castro could leave for Mexico. Treviño said that information was not available at the time of the release and would not have changed the outcome.

"Even if I had that information, legally I could not hold him anymore," Treviño said.

Treviño said the office was not taking sides in the matter.

"We feel for the family of the individual who was injured, but we also have a duty to abide by the law," Treviño said.

If Abbott approves Minnesota's extradition request, Castro could be arrested again, Treviño added.