MIAMI , Florida ( CNN ) -- A Florida state investigation has determined that 31 crosses on the grounds of a former reform school mark graves of teens and employees who died in a fire and an influenza outbreak . Crosses mark graves of reform school students killed in a fire and flu outbreak in the early 1900s , investigators say . One grave even contains the body of a student who was slain by another student , the investigation found . The five-month investigation by the Florida Department of Law Enforcement rules out claims by a group of reform school survivors that students who were beaten by guards are buried there . The former students , now in their 60s , call themselves the `` white house boys , '' after a concrete-block building where boys were taken for punishment . They said that they witnessed murders , and that students suddenly disappeared after they suffered severe beatings at the school , in Marianna , Florida , in the 1950s and '60s . The men believed the graves , marked only by white steel crosses that are rusting with time , were those of the teens who were beaten and killed by reform school workers and administrators . But authorities found documents that pointed to the fire and the flu outbreak . They said they plan no exhumations . `` This is our conclusion , based on what we know today , '' said Mark Perez , the chief of investigations for the Florida Department of Law Enforcement . `` Enough information has been corroborated on who is buried there . We went and identified all of the individuals who perished while in custody , '' he said . The FDLE released its results in an 18-page investigative report . It says that no information confirms that any of the administrators or workers at the facility contributed to the deaths of any of the students . Their investigation into the charges of physical abuse , made by the former reform school students , continues . However , the investigators concluded that claims by the former students of slayings and disappearances of boys could not be corroborated . `` None of the former students were able to provide any first-hand information which would have identified any of these alleged victims , or the persons responsible for their purported demise , '' the report states . Roger Kiser is one of the former students who pushed for the investigation . He 's written a book on the alleged abuse at the school and says that the FDLE has yet to contact him , despite , he says , witnessing two deaths at the school . `` My personal feeling is that the State of Florida does not want to know the truth . It is just too horrible a tragedy for the general public to learn about , '' he wrote in an e-mail to CNN . Florida 's governor , Charlie Crist , had ordered an investigation to determine who is buried in the 31 unnamed graves . The graves are in a secluded area on the property of what was the Florida School for Boys in Marianna , a town near the Georgia border . The FDLE says that records have determined that the cemetery was known to everyone back in the early 1900s , and the details got lost in time . `` There was enough information available to establish their identities and the cause of death , '' said Mark Perez of the FDLE . However , the FDLE has not been able to determine why the graves are not marked with headstones or any other identifiers . `` That 's the million-dollar question . We ca n't find any records why they were n't marked , '' he said . But records have determined that the remains are those of boys who died in a fire at the reform school in 1914 . Many of these victims were orphans and indigents whose families could not afford to have the bodies shipped home . And so , the FDLE said , they were buried at the school . Others died in a flu epidemic , in about 1918 . According to the FDLE , among the remains are those of one reform school boy who was slain by another student . Other graves are those of pets . The deaths were reported extensively in local news coverage , and even in a newsletter that was published , at the reform school , called `` The Yellow Jacket . ''
NEW : Investigation continues into whether teachers abused boys in 1960s . Florida School for Boys hit by a fire , 1918 flu outbreak . Police say they have no evidence boys were killed by school officials . Superintendent ordered investigation of what lay beneath 31 white crosses .