UPPER MARLBORO, MD – A Maryland jury on Wednesday convicted Harold Francis Landon III of first-degree murder in the brutal death and dismemberment of 59-year-old elementary school teacher Mariame Toure Sylla, whose disappearance last summer rattled a close-knit suburban community.
Prosecutors said Sylla, originally from the Ivory Coast and a beloved second-grade teacher at Dora Kennedy French Immersion School, fell victim to a random attack while on her evening walk in a Greenbelt park on July 29, 2023. Evidence in the case, including DNA, surveillance footage, and a revealing jailhouse phone call, quickly pointed investigators to Landon.
Jurors took about an hour to return the guilty verdict after listening to recordings where Landon admitted releasing his “savage” side, words prosecutors argued were a confession to the crime. A key moment came when jurors heard Landon’s phone call from jail, in which he lamented his actions with chilling candor.
Authorities pieced together their case using multiple forms of evidence. Surveillance photos captured Landon dumping what was later determined to be a portion of Sylla’s remains into a retention pond. In addition, Sylla’s DNA was discovered on Landon’s boots, and her clothing—specifically a portion of her dress and scarf—was found in the bed of his pickup truck. Cellphone records also placed Landon at the scene at the critical time.
Police discovered human remains outside a business in Clinton approximately three days after Sylla was last seen. Landon was initially apprehended that day on a separate assault charge and subsequently arrested for Sylla’s murder after identification of the recovered remains.
Investigators noted that Landon and Sylla had never met prior to the attack, which authorities described as random. While the full extent of Sylla’s injuries and precise cause of death remain officially undetermined, police believe Landon strangled her before dismembering her body and scattering the remains.
Despite a robust case, Landon professed innocence throughout the proceedings, with his defense attorney suggesting the prosecution relied on speculation rather than clear proof.
Following the verdict, Prince George’s County State’s Attorney emphasized the importance of removing Landon from the public, noting that attempts to destroy evidence had ultimately failed to prevent the jury from reaching a unanimous decision.
Sylla, remembered by colleagues and students for her dedication and gentle spirit, was mourned deeply by the school community. She had moved to the United States about ten years ago to continue her teaching career.
Landon is scheduled for sentencing on October 17, where he faces the possibility of a significant prison term in connection with the murder conviction.