Philadelphia ( CNN ) -- Court documents obtained by CNN on Friday reveal disturbing new details about the prior conviction of the alleged ringleader of a group charged this week with imprisoning four mentally disabled adults in a dank Philadelphia boiler room . Linda Ann Weston , 51 , served eight years in prison for killing her sister 's boyfriend , Bernardo Ramos , in the early 1980s , according to Philadelphia police . The newly obtained documents show Ramos , held captive in a closet , weighed 75 pounds at the time of his death by starvation in December 1981 . The medical examiner at the time determined the cause of death `` due to the clear visibility of his protruding ribs , sunken cheeks and emaciated body , '' according to the documents . Weston , along with three others , is currently facing charges including criminal conspiracy , aggravated assault , kidnapping , criminal trespass , unlawful restraint and false imprisonment after the landlord of an apartment building discovered Saturday four malnourished people locked in a 15-by-6-foot room with no food and only a bucket for a toilet , according to Philadelphia police . Testimony in the Ramos case showed the man was fed only four times while held in the closet for about two months , and was removed from the tiny space only `` six or seven times '' during his captivity . `` When he finally died of malnutrition , the sisters wheeled him in a baby carriage to an abandoned building where he was discovered two days later , '' one of the documents states . It was not immediately clear which sisters the documents referred to . The court documents show Weston was initially found incompetent to stand trial . Two years later , after being hospitalized , she was certified by the court and found guilty of voluntary manslaughter and criminal conspiracy , according to Philadelphia police and court documents . The court found she `` was legally sane '' at the time she held Ramos captive and `` had the full intent to conspire '' with her siblings when she directed them to dispose of the body . The current investigation into Weston and her alleged co-conspirators has taken several bizarre twists as authorities try to piece together the evidence in the case , which has spread to at least two other states after detectives discovered that one of the accused had traveled across state lines with the people found in the boiler room . Police said Wednesday that Weston , 47-year-old Gregory Thomas , 49-year-old Eddie Wright and 32-year-old Jean McIntosh , Weston 's daughter , may have been holding seven other people , including Weston 's 19-year-old niece , who showed signs of torture and abuse . Authorities are also looking into whether some of the victims ' Social Security checks had been stolen . Philadelphia Police Commissioner Charles Ramsey told CNN on Monday that Weston had IDs for about 50 people in her possession : `` Social Security information , power of attorney information , those kinds of things . '' The case continued to develop Friday when CNN uncovered new information that shows the Philadelphia case was not the first time Weston has drawn scrutiny for possible Social Security fraud . The Social Security Administration 's Office of Inspector General confirmed to CNN that it investigated Weston in 2009 for continuing to collect benefits for her roommate , Maxine Lee , after she died of acute meningitis . When the administration finally cut off benefits , Weston appeared at a Philadelphia office seeking to have the benefits reinstated , the Office of Inspector General said in a statement to CNN . The money -- totaling less then $ 3,000 -- was repaid to the Social Security Administration , the inspector general said . The acknowledgment by the inspector general 's office has raised questions about why the Social Security Administration allowed Weston , a convicted murderer , to serve as a `` representative payee '' for a Social Security recipient . Under Social Security Administration policy , certain individuals convicted of criminal offenses are prohibited from serving as representative payees . The Social Security Administration has begun reviewing its handling of Weston . After initially asking for questions for comment in writing from CNN , a spokeswoman for the administration declined to provide details of the Weston case , including whether Weston was the representative payee for any of the people found in captivity in Philadelphia . `` We are very concerned about this situation . As this is an ongoing investigation , we ca n't provide you any details at this time , '' spokeswoman Kia Green said . Meanwhile , police in Norfolk , Virginia , are taking a fresh look at Lee 's death in light of the Philadelphia case . According to police , Weston , who was caring for Lee , reported her death on November 13 , 2008 . An autopsy determined the cause of death to be acute bacterial meningitis . The medical examiner who conducted the autopsy said a contributing factor in Lee 's death was `` cachexia of unknown origin , '' or malnutrition . The manner of death is listed as `` natural causes . '' Norfolk police spokesman Chris Amos said investigators have not yet decided to formally reopen the Lee case . The physician who conducted Lee 's autopsy has reviewed the autopsy report and `` has n't come to any other conclusions '' about the cause of death , said Glenn McBride , spokesman for the Tidewater office of the Virginia Medical Examiner 's Office . `` We 're waiting to hear from the police if anything needs to be done by our department . '' At the time of Lee 's death , police say they did not know that Weston had served time for murder . The department did not conduct a murder investigation because the death was ruled natural , Amos said . Sarah Hoye reported from Philadelphia . Susan Candiotti and Ross Levitt reported from New York . Mike M. Ahlers reported from Washington .
Alleged ringleader in case was convicted of starving to death her sister 's boyfriend in 2009 . The man weighed 75 pounds at the time of his death , newly obtained documents show . Ramos was also investigated in 1981 for claiming benefits for her dead roommate . Police in Washington say they are now re-examining the circumstances of the roommate 's death .