NBC NEWS – Scientists have found 19 previously unknown grave shafts on the grounds of a notorious Florida reform school, suggesting that many more boys died there amid brutal conditions than had previously been known, the researchers said Monday.

The Arthur G. Dozier School for Boys in Marianna, which was also known as the Florida State Reform School, closed in June 2011 after state investigators and the U.S. Justice Department’s Civil Rights Division confirmed widespread abuse over many decades.

The state attributed its decision to close the school to budgetary reasons. Yet long before then, the institution had been the target of investigations and lawsuits alleging not only physical and mental abuse but also forced labor, rape and even murder of the young charges sent to its care since it opened in 1900.

The prominent writer Roger Dean Kiser, author of “The White House Boys — An American Tragedy,” about the horrors he experienced while incarcerated there in the 1950s as a child, has called the school a “concentration camp for little boys.” He wrote that “a devil was hiding behind every tree, every building and even behind every blade of manicured grass.”

They’re called the White House Boys because much of the abuse occurred in an 11-room building on the school grounds known as the White House, where former students say they were beaten with leather straps. A group of the former students sued the state in 2010, but the case was dismissed because the statute of limitations had expired.

Previous investigations and records had reported that 31 boys were buried on school grounds, and that most of them died in a fire and an influenza outbreak at the school in the early 1900s. But researchers at the University of South Florida, in Tampa, say they now estimate there are at least 50 grave shafts in the area of the school’s cemetery and the surrounding woods. Some graves may have been the final resting place for more than one boy, the researchers said in an interim report released Monday.

Records recovered and examined by the researchers indicate that at least 96 boys and two adults died at the school from 1914 to 1973. Most of boys who were committed to the school and died there were African-American.

But that may be only the tip of the iceberg: The researchers didn’t have access to student records after 1960, when such documents became subject to privacy laws. Moreover, researchers couldn’t test the entire area because of overgrowth and vegetative conditions, they said.

And more chillingly, there may be other, secret graveyards somewhere on the grounds, given the number of still-unaccounted-for cases and the practice of segregating cemeteries during the first half of the last century, Erin Kimmerle, an assistant professor of anthropology at the university, said on a conference call with reporters. It’s highly unlikely that white boys were buried with black boys during those decades, but as yet, the researchers haven’t found a previously hidden whites-only cemetery.

“I didn’t realize going in how much of a story of civil rights it was,” Kimmerle said.

The research team used ground-penetrating radar and other methods to map the school’s cemetery and chemically analyzed the soil to identify the number of graves.

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