Police: 14-year-old already on GPS was tooling around Washington-Beech in Roslindale with a loaded gun in his underwear

Boston Police report arresting a Dorchester 14-year-old at Roslindale's Washington-Beech development on gun charges Monday evening.

According to police, a security guard reported a person with a gun on Beechland Circle around 6:20 p.m. When officers arrived, the guard pointed them to a car just leaving the street, and said the person was in the car:

Officers stopped the motor vehicle and approached in an effort to speak with the occupants. As additional units arrived on scene, the rear passenger suddenly fled from the vehicle. Officers gave chase, apprehending the individual a short distance away at 59 Beechland Circle. During a frisk of the suspect for weapons, officers located a Taurus G2C 9mm firearm loaded with six rounds of live ammunition which the suspect had attempted to conceal within his undergarments.

The kid, who was also wearing an ankle bracelet GPS device, typically only ordered for people involved with the court system, was charged with unlawful possession of a firearm, unlawful possession of ammunition, carrying a loaded firearm on a public way and possession of a high-capacity firearm, police say.