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11h ago

Peer-Reviewed Study Details How Moss Evidence Helped Crack the Burr Oak Cemetery Case

Researchers outline chlorophyll-based methods that tied the reburials to cemetery employees.

Lead author Matt von Konrat in his laboratory at the Field Museum on February 26, 2026, examining the tiny bits of moss found with the re-buried bodies at Burr Oak Cemetery in 2009. The computer screen shows the view of the moss specimen under the microscope. (Credit: Photo © Field Museum.)
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The side entrance located on 127th St. to Burr Oak Cemetery, near Alsip, Illinois.

Overview

  • The paper, published in Forensic Sciences Research, presents the first full scientific account of the 2009 Burr Oak investigation and the moss analysis used in court.
  • Field Museum botanists identified the sample as Fissidens taxifolius and mapped it to a different area of the cemetery, linking reburied remains to their original section.
  • Chlorophyll measurements against museum specimens indicated the moss had been buried only recently, with coverage reporting estimates from less than six months to about one to two years, aligning with the defendants’ tenure.
  • The botanical evidence helped secure 2015 convictions of the cemetery’s former manager and three workers for desecrating human remains, according to an FBI agent who co-authored the study.
  • The original moss specimen is now part of the Field Museum’s collection, and the authors urge investigators to consider bryophytes more routinely in forensic work, noting only about a dozen such cases in the past century.