Motor Vehicle Stop Leads to Heroin Arrest in RoslindaleOfficers assigned to District 18 on patrol in the American Legion Highway and Canterbury Street area observed an operator of a motor vehicle make an unsafe lane change. The officers followed the motor vehicle and clocked the car traveling 42 miles per hour in a 30 mile per hour zone. The officers activated their emergency equipment and stopped the vehicle. While conducting a motor vehicle stop, the officer observed a small bag of heroin. Officers arrested Onasis Bladimir Troncoso, 21, of South Boston and charged him with Possession with Intent to Distribute Class A, and Possession of Class A substance. At the booking desk, another bag of heroin was recovered from the suspect. He will be arraigned in the West Roxbury Court this morning. Juveniles Arrested in Roxbury after Breaking and Entering Apartment Last night at about 7:00pm, officers from District 4 responded to a call for a breaking and entering on Windsor Street in Roxbury. Officers spoke with the victim who stated she was in her apartment when her alarm went off. She observed her from door open and she fled her house and called police. A description of the suspects was broadcast over the police radio of the suspects. An officer observed two people matching the description put out by police at Lenox Street and Trotter Court. The officer stopped the two and discovered them to be in possession of items stolen from the victim. Both suspects were placed under arrest. Police charged the 16-year-old male from East Boston and the 15-year-old male from Boston with Delinquency to wit: Breaking and Entering. Both will be arraigned this morning in Juvenile Court. Four Juveniles Arrested in South End for Larceny of Bikes Boston Police Operations broadcast a description this morning at 1:25am of a group of black males attempting to break and enter a vehicle parked at Newbury Street and Gloucester Street. According to a witness, the group was observed attempting to pry open the door of the vehicle. When the suspects observed the witness, they fled the area. Ten minutes later, officers assigned to District 4 observed a group of suspects matching the description of the wanted group on bicycles at Newbury Street and Dartmouth Street. The officers stopped the four juveniles and discovered them to be in possession of bolt cutters as well as riding stolen bicycles. The witness at the scene positively identified all four suspects. The bicycles were seized, and all four suspects were placed under arrest. Arrested were two 16-year-old males from Concord, NH, a 16-year-old male from Boston, and a 16-year-old male from Roxbury. They will be arraigned in the Boston Juvenile Court this morning.