UPPER MARLBORO, MD – A Maryland man was found guilty of first-degree murder this week in the brutal killing and dismemberment of an elementary school teacher who disappeared while out for an evening walk last summer.
Jurors convicted 34-year-old Harold Francis Landon III in the death of Mariame Toure Sylla, a respected second-grade teacher from Dora Kennedy French Immersion School, after a swift deliberation that lasted about an hour. Sylla, 59, vanished in July 2023 while walking in a park in Greenbelt, a suburb of Washington, D.C.
Sylla’s disappearance quickly drew concern from her community, launching a search that ended days later with the grim discovery of human remains in Clinton, roughly ten miles away. Sylla, originally from the Ivory Coast, had spent years inspiring children before her life was cut short.
Key evidence presented at trial included a recorded phone call Landon made from jail, during which he admitted, “I literally let the savage inside of me out.” Prosecutors played the call for the jury during their closing arguments.
Photographs taken by a local business owner showed Landon dumping what investigators later determined were parts of Sylla’s dismembered body into a retention pond. Detectives linked Landon to the crime scene using cellphone records, which placed him in the area at the time of Sylla’s last known whereabouts. DNA evidence and surveillance footage further connected him to the murder.
Investigators said there was no known relationship between Landon and Sylla, describing the attack as entirely random. Authorities were never able to recover all of Sylla’s remains, but forensic analysis found her DNA on Landon’s boots and articles of her clothing in the back of his truck.
Landon was initially arrested on unrelated assault charges on August 1, the day some of Sylla’s remains were discovered. He was charged with her murder after further investigation and a positive identification of the body.
During the trial, Landon maintained his innocence. His defense attorney argued there was not enough evidence for a conviction, describing the case as speculation. The jury, however, was convinced by the prosecution’s presentation of physical evidence and Landon’s own words.
Following the verdict, the state’s attorney emphasized the significance of removing Landon from the community, highlighting not only the brutality of the crime but also the efforts made to destroy evidence.
Landon is scheduled to be sentenced on October 17, when he faces the possibility of life in prison without parole.
The case has sent shockwaves through Sylla’s school and the greater Greenbelt community, where she was remembered for her dedication to her students and the lasting impact she made as an educator.