After walking and hitch-hiking more than 4,000 kilometers (2,500 miles) to the USA southern border, some 500 migrants tried to breach it on Sunday.
Under the harsh immigration policies introduced by the administration of President Donald Trump, U.S. border officials say they may have to stay put in Mexico for months before they can petition the authorities. Still others escaped prosecution because in the chaos surrounding Sunday's incident, authorities missed pieces of information necessary to file charges, such as the names of the officers who made arrests.
"As DHS confirmed weeks ago, there are at least 600 known criminals in the caravan flow".
She said she couldn't walk around freely without fear, her children never attended school because it was too unsafe.
The 44-year-old native of Usulutan, El Salvador, spoke alongside his wife and two children as he surveyed the limited indoor space while many other caravan migrants set up simple camps in an open square in the middle of the property.
"Consistent with the president's direction to do all within our authority to secure USA borders, I am seeking your assistance and ask you to prioritize efforts to help us prevent illegal entry into the United States", Nielsen wrote.
"Why are (the police) treating us like this if we're not causing them or the Mexican people any trouble?" he said. Once there, they were stopped at the border and now wait.
Australian steer stands out in his field
According to the record books, the tallest living steer is Bellino - who was 2.027m tall when he was measured in 2010 in Italy. According to Perth Now , Knickers' owner, Geoff Pearson, said the cow's startling size had saved him from the slaughterhouse.
Congress wants another shot at a guilty Michael Cohen
That investigation has since expanded into Trump's business dealings about which Cohen would have critical information. Mr Trump said on Twitter, referring to a United States senator who led an anti-communist crusade in the 1950s.
Homeland Security: We Are Prepared to 'Shut Down' Ports of Entry
On the weekend, frustration led to a protest and when some in the group rushed the border fence, U.S. authorities responded. US Customs and Border Protection, which polices the border, said its personnel had been assaulted and hit by stones.
But critics insist the violence is being exaggerating to stoke fears and push political agendas, and say most of the people coming are fleeing violence and poverty in Central America. That prompted Border Patrol agents to launch tear gas and pepper spray balls to quell the unrest.
Many others were not referred to the Justice Department because they were children or parents accompanying children, the official said.
Immigration officials often deport people who cross illegally instead of prosecuting them first for the federal crime of illegal entry because of "resource constraints, statutory roadblocks and process limitations", Homeland Security spokeswoman Katie Waldman said.
The only two individuals Customs and Border Protection referred for prosecution ended up not being charged because they had medical problems and could not be held at the San Diego detention center, according to reports.
Trump has threatened to "permanently" close the U.S.
Not all the migrants plan to apply for asylum - either because they can not prove that their lives are in danger or because they are fleeing economic hardship rather than violence. Asylum seekers are often released in the US pending the outcome of their cases in immigration court.