As the migrant crisis at the southern border continues, leaked documents from US Border Patrol revealed the Biden Administration released at least 160,000 illegal immigrants into the US, often under processes that provide little supervision.

The leaked document, obtained by Fox News, revealed that since March 20, 94,570 migrants had been released into the US under Notices to Report. Those who received notices must check in with an ICE office only once they get to their final destination within the US, within 60 days. Those who followed through with check-ins are reportedly not deported or detained while their immigration case moves forward.

Since August 6, the Biden Administration released 31,977 migrants have been released into the US on parole, which according to Fox News, "gives migrants a form of legal status and the ability to apply for work permits."

According to federal law, Parole authority is supposed to be used on a case-by-case basis for "urgent humanitarian purposes" and "significant public benefit." Usually, only a handful of cases are granted parole by officials. Still, the Biden Administration pushed migrants through, including tens of thousands of Afghans who came into the US as part of Operation Allies Welcome.

Former Border Patrol Chief Rodney Scott, who served under President Biden, told Fox News he believes that the administration is abusing its parole authority. "By law and regulation, parole shall only be granted on a case by case basis and only for significant humanitarian reasons or significant public benefit. Neither of these appears to apply to the current situation," he said.

"As a field chief, I don't believe I ever approved more than 5 or 10 paroles in a year," said Scott. "When I did, I ensured that the alien was monitored continuously and was detained or removed as soon as the circumstances allowed."

Since August 6, they released just shy of 40,000 migrants into the US on their recognizance. "The documents also show that on one single day in Del Rio sector, 128 single adult illegal immigrants were released into the US without ATD – which typically includes tracking by an ankle monitor or phone," wrote Fox News.

A Customs and Border Protection official told Fox News that mechanisms like paroling, the use of NTRs and enrolling migrants in Alternatives to Detention (ATD) "provides mechanisms to require family units released from CBP custody to report to ICE within a specified time." The official also told Fox News that between 2014 and 2020, 81 percent of those released into the US reported in for their immigration proceedings.