At about 7:00 PM on Saturday, June 20, 2026, officers assigned to District B-3 (Mattapan) made an onsite arrest in the area of 1617 Blue Hill Avenue in Mattapan.
While guarding the crime scene for a fatal motor vehicle collision that had occurred hours earlier, officers were alerted that an unknown male had entered the taped off crime scene near the intersection of Fairway Street and Blue Hill Avenue. Officers observed the suspect video recording the scene while laughing. As officers approached the suspect he took off and began running through the crime scene. The suspect ignored verbal commands from officers and then dumped a cup containing an unknown liquid into the middle of the crime scene. The suspect continued to run around the area while laughing and video recording. After evading several officers, the suspect was eventually apprehended on the median of Blue Hill Avenue.
Officers arrested Robert Monestime, 21-years-old, of Braintree. Monestime is expected to be arraigned in Dorchester District Court on charges of Disturbing the Peace and Interfering with a Police Officer.