Chicago federal intervention: Tracking surge in immigration enforcement operations | Updates

Whether it is a publicity stunt or a legitimate crackdown on immigration, what does the law say about federal agents randomly stopping people to question them?

Some legal experts are weighing in.

"We are looking very closely at that video and gathering more evidence to potentially bring follow on litigation around this issue of the stop piece of it," said Mark Fleming with the National Immigration Justice Center.

The National Immigration Justice Center has already taken legal action against the Trump administration for unlawful arrests, including a recent Elgin raid where a U.S. citizen was detained. As for random stops, law experts say the U.S. Supreme Court allows federal agents to stop and question someone only if they have a "reasonable suspicion" that person in the U.S. without authorization.

"I would argue that it's not reasonable even to stop somebody for questioning solely based on their ethnicity and the language they speak," said Northwestern Pritzker School of Law Prof. Paul Gowder.

Northwestern Pritzker School of Law Professor Paul Gowder says racial profiling is not a reasonable suspicion in a city like Chicago, with a large Latino population. In an emergency ruling, the Supreme Court did allow profiling to continue on California. However, experts say the ruling only applies to that specific case. In the meantime, lawyers say if you are stopped, stay silent.

"You say that 'I do not want to answer any of your questions unless I can speak to an attorney,' and 'Am I permitted to leave?'" Fleming said.

The National Immigrant Justice Center is urging people to video tape and document any interaction with federal immigration agents. Attorneys say documentation is key in their fight to uphold the Fourth Amendment. Click here for more.

The Department of Homeland Security is requesting that 100 military personnel be sent to Illinois, Gov. JB Pritzker said during a press conference on Monday afternoon.

Pritzker called that press conference to bring more attention to recent action by federal agents in Illinois and highlight incidents that happened in Broadview and downtown Chicago over the weekend. Click here for more.

A group of United States Border Patrol agents in Chicago chased after a cyclist on Sunday, after he taunted them and repeatedly told them that he was "not a U.S. citizen."

Border Patrol agents were seen chasing after a cyclist after he claimed he was 'not a US citizen' on Dearborn Street in the Loop downtown Chicago.

Footage of the chase in the 300-block of North Dearborn Street in the Loop was captured by Christopher Sweat, who said that agents chased after the cyclist after he "made verbal comments but no physical or threatening contact."

The footage shows the cyclist repeatedly saying "I'm not a U.S. citizen" and "come on" to the agents.

At one point, the cyclist's phone appears to fall out of his pocket. An agent is heard saying "you dropped your phone."

As the cyclist picks up his phone, some of the agents dash toward him.

The cyclist then bikes away.

Protests outside the Broadview ICE facility have been happening for several days, and demonstrators continued to make their voices heard on Sunday night.

At one point on Sunday night, protesters tried to put up flags, and agents fired mace and pepper bullets in response. However, everyone appeared to be OK, and no one was detained.

Still, was a much calmer atmosphere outside of the facility throughout Sunday after the escalation ABC7 crews witnessed there on Saturday night.

Beach Street has been reopened, allowing protesters to be right up against the facility's fence again, and there were much fewer federal agents present outside compared to Saturday.

Protest organizers rebuilt a tent and moved it further away from the facility after federal agents tore down their belongings on Saturday night while deploying tear gas to disperse the crowd.

They had been taking in donations to help families impacted by ICE operations, but much of that was ruined during the escalation.

The presence of Border Patrol and Bureau of Alcohol, Tobacco, Firearms and Explosives agents has dwindled compared to what was seen in Broadview on Saturday.

Protesters say they will continue to show up as the Trump administration targets the Chicagoland area in federal operations.

President Donald Trump posted on social media earlier Sunday, referencing Chicago with a video of the escalations between protesters and federal agents in Broadview. Click here for more.