The El Salvadoran was mistakenly deported by the Trump administration but was brought back to face human smuggling charges.

Kilmar Abrego Garcia, who was wrongly deported in March before being brought back to the U.S., has been released from criminal custody in Tennessee and is on his way to Maryland, an attorney for Abrego Garcia told ABC News.

Abrego Garcia walked out of federal custody for the first time since March, when he was deported to El Salvador in what the government has called an "administrative error."