A Facebook fundraiser gave this immigrant advocacy group a record-setting $20 million. Here's what's happened since

A 2-year-old Honduran asylum seeker cries as her mother is detained near the US-Mexico border in June 2018.

(CNN)For over 20 days, his 1-year-old son had diarrhea.

He'd had it ever since they arrived at the Karnes County Residential Center in Texas, an ICE detention facility built to detain families apprehended at the border, just steps from the county jail.
The father had come from Honduras after a gang threatened to kill him. But he felt helpless watching his son suffer. The baby wasn't eating or sleeping, and he'd also developed a cough and a runny nose that wouldn't go away.
Seven-year-old Andy is reunited with his mother, Arely, at Baltimore-Washington International Airport on July 23, 2018.
"My son cannot eat the food served at Karnes. He neither receives a special, age-appropriate diet, nor a diet specific for his health condition," the father said, according to a tweet. "All residents are served the same meals and no accommodations are made for serious medical and dietary needs."
    As for the doctors, he said they weren't helping, instead telling him to force-feed his son.
    This was in March. But four days after a Texas-based nonprofit tweeted about the boy's plight, the family was freed.
    How? Well, it started with a viral Facebook fundraiser on behalf of the Refugee and Immigrant Center for Education and Legal Services, or RAICES.

    Zero to $20 million in about a week

    Last year, Charlotte and Dave Willner started a Facebook fundraiser after they saw the viral photo of a 2-year-old child from Honduras crying as her mother was searched and detained by U.S. Border Patrol.
    Their original goal was $1,500, with the money going to RAICES, a nonprofit in Texas that gives free legal services to immigrants and refugees.
    Two days after they created the fundraiser, the campaign had raised over $6 million.
    They set a new goal of $8 million. It surpassed that too.
    In just over a week, the campaign raised more than $20 million. Along with other donations outside of the individual campaign, more than $25 million went to RAICES, all over the course of just a few days. The fundraiser became the largest single campaign in Facebook history.
    Jonathan Ryan, CEO of RAICES, has been with the organization for 11 years. He told CNN that last summer's campaign was unprecedented in its magnitude. The staff was euphoric at the time, but only intermittently.
    "Most of our energy was focused on doing the work in real time, which continued almost unperturbed by that reality, by that phenomenon," he said.
    It's been one year since the viral fundraiser. Without the money, cases like the sick baby may never have seen the light of day.
    But how exactly has RAICES been using all that money?

    RAICES tripled their workforce in less than a year

    Before the fundraiser, RAICES had 68 employees. Now, the organization has over 200, more than tripling the size of their staff in less than a year. They are the largest pro-bono legal services provider in Texas and possibly even in the country.
    A toy is seen from Piedras Negras, Mexico, as the US Border Police guard the international bridge in Texas, on February 6, 2019.