DORCHESTER — Boston's nightlife served notice at 1:19 a.m. Tuesday, when 25 Dacia Street, a block off Quincy Street, erupted in gunfire — four rounds, then a burst of fifteen or more — leaving 17 shell casings in the street, two houses pocked with bullet holes, a parked car shot up, and one wounded man dumped at the door of a local emergency room by what appears to have been his own crew.

Within minutes, the monitor reported rounds had ripped into a house on Dacia Street and BPD was checking the interior for victims.

By the time detectives arrived on Dacia Street, the casing count was 17.

A parked car. A second house. Both clipped by flying rounds.

Then came the detail that turned an overnight shooting into something darker.

At 1:43 a.m., according to the live thread, "two dudes in a black BMW pulled up, blood in the front seat, black latex gloves all over the place, dumped the shooting victim at the ER entrance and took off running toward Worcester Square."

Latex gloves are the accessory of two kinds of people — medical professionals, and crews that don't want fingerprints on the steering wheel.

At 2:31 a.m., the volunteer team posted what an eyewitness had told them: the Dacia Street gun battle was "looking like somebody caught a round in the back from they own side — 'friendly fire' type situation." Translation: the wounded man wasn't the target. He was on the trigger end of the same crew. The bullet hit the wrong back.

By 3:34 a.m., the call had been escalated. "Homicide activated and handling business now," the thread reported. "Emergency deployment teams rolling to cover in-district 911 calls." A piece of Boston had effectively been pulled off the regular 911 board so detectives could work the scene undisturbed.

The temperature in Boston Tuesday morning is still hovering in the 60s. Memorial Day weekend — the unofficial opening night of the city's violent-crime season — is more than two weeks out. The weather hasn't even turned, and Dorchester is already running 17-casing nights with a side of friendly fire.

What happens when the thermometer cooperates is, at this point, a known quantity. Like every northern American city, Boston's shooting numbers climb with the heat. Mayor Michelle Wu has spent the past year telling national press that Boston is "America's safest big city." The first 17 casings of summer 2026 are now sitting in a BPD evidence box on Dacia Street.

Tuesday morning's Dacia Street gun battle is the fourth Boston shooting in as many days — coming on the heels of a fatal Mattapan shooting and two more Dorchester incidents over the weekend.