FILE- In this Feb.19, 2019 file photo, children line up to enter a tent at the Homestead Temporary Shelter for Unaccompanied Children in Homestead, Fla. The company that runs the center is Comprehensive Health Services, which is part of Virginia-based Caliburn International Corporation is abandoning its plans to conduct a public offering. Chairman Thomas J. Campbell, sent a letter Tuesday, March 5, to the Securities and Exchange Commission saying it no longer wishes to conduct a public offering. (AP Photo/Wilfredo Lee, File)

MIAMI - The corporation behind a Florida detention camp for migrant children abandoned its plans to go public Tuesday as controversy grows around policies that lock up children crossing the Mexico border.

The chairman of Caliburn International Corp., Thomas J. Campbell, sent a letter to the Securities and Exchange Commission saying it no longer wishes to conduct a public offering.

The Virginia-based company said in a press release the reason was "variability in the equity markets," adding that business continues to grow. Previous filings cited risks of "negative publicity" as something that could affect share price.

The U.S. Department of Health and Human Services, which takes custody of children who cross the U.S.-Mexico border, announced in December that the facility was expanding from 1,350 to 2,350 beds. Officials said the Homestead detention centre in a Miami suburb is one of the largest and the only one run by a for-profit company.

The agency offered a press tour last month of the growing facility showing a large room where 144 teenagers slept in bunks. Portable toilets were housed in adjacent tents. The children walked in groups of 10 to 15 in single file, led by a uniformed employee.

Caliburn had also previously said it expected to increase its operations in housing children who are taken into custody at the U.S.-Mexico border. It attributed a growth in revenue to new contracts at Homestead and three smaller facilities in Texas.

The Obama administration opened Homestead as a temporary shelter for up to 800 migrant teens for 10 months in 2016.

Comprehensive Health Services is the company that has been running the facility since then. But it was bought by a Washington private equity company called DC Capital Partners last March before the Trump administration announced a policy that led to more than 2,700 children being separated from their families and placed in shelters.

John Kelly, who stepped down as President Donald Trump's chief of staff in January, sat on the board of DC Capital Partners right before joining the White House, first as Homeland Security secretary. He also was a member of boards of other companies that are part of the private equity firm's portfolio.

The private equity company formed Caliburn in August by grouping Comprehensive Health Services and three other companies.

In securities filings, Caliburn reported total revenue of $785 million in 2017. That does not include two large contracts totalling more than $250 million that the federal government has awarded Comprehensive Health Services since 2018.

Darian Ibrahim, a professor of the law school of the College of William & Mary who has expertise in securities, said the company's explanation Tuesday regarding equity markets "seems a bit strange" because a lot of other firms are looking to go public.

"It doesn't seem like the equity markets are all that bad or that we had a downturn just yet," Ibrahim said. "My guess is big investors either don't want to be associated with this company or they are afraid the business model is not going to work out because of the negative press."

Democratic lawmakers introduced legislation in December aimed at closing two unlicensed facilities in Homestead and Tornillo, Texas, which shut down in January after lawmakers and immigrant rights advocates pressed for the closure.

Last month, Florida Democratic Rep. Debbie Mucarsel-Powell and other representatives toured the centre and said they were concerned that a for-profit company was chosen to receive more children than any other facility and that some teenagers were being held there for months. The average length of stay at Homestead has gone up since last summer from 25 days last June to 67 days as of December.

"While I'm pleased that Caliburn abandoned its plans to go public now, they are still profiting off of the Trump Administration's inhumane immigration policies," Mucarsel-Powell, whose district includes Homestead, said in a statement. "Migrant children are still being locked up in Homestead, and I haven't received a clear answer why they remain there longer than at a government shelter."

On Tuesday, activists who staged a demonstration outside the Homestead detention centre condemned the government, saying it is helping a company grow a business out of detaining children.

"As children await their freedom, the company is making a lot of money. It is supposed to be a temporary shelter, but this is being run as a business," said Maria Bilbao, of the organization United We Dream.

___

Associated Press writer Gisela Salomon contributed to this report from Homestead, Florida.

News from © The Associated Press, 2019