Yoseliani Marte was 18 when she was found dead inside a rented house on Malta Street in Mattapan on the afternoon of Saturday, July 18, 2026. Boston police discovered a single gunshot wound; the Office of the Chief Medical Examiner ruled her death a homicide and she was pronounced dead at the scene.

Yoseliani, known as Liani or Mookie, was remembered by family as vibrant and kind. Her parents, Elenie Ocasio and Jose Marte, and her coworkers at Shea Butter Smoothies described her warmth; her favorite menu item was the Big Papi smoothie. The Malta Street property is owned by Conan Harris, husband of Representative Ayanna Pressley, and investigators have said there is no evidence linking the property owners to the killing. A memorial of candles and balloons was left outside the home.

The Boston Police Department Homicide Unit is leading the ongoing investigation. As of early August 2026 no arrests had been announced and police had not publicly identified suspects or a motive. Does anyone with knowledge of Yoseliani, the Malta Street home, or the Mattapan area on July 18 have information that could help?