U.S. Immigration and Customs Enforcement cannot re-detain Kilmar Abrego Garcia because a 90-day detention period has expired and the government has no viable plan for deporting him, a federal judge ruled on Tuesday.

The Salvadoran national’s case has become a focal point in the immigration debate after he was mistakenly deported to his home country last year. Since his return, he has been fighting a second deportation to a series of African countries proposed by Department of Homeland Security officials.

The government “made one empty threat after another to remove him to countries in Africa with no real chance of success,” U.S. District Judge Paula Xinis, in Maryland, wrote in her Tuesday order. “From this, the Court easily concludes that there is no ‘good reason to believe’ removal is likely in the reasonably foreseeable future.”