Boston Police last night arrested Jermeil Robinson, 17, of Jamaica Plain, for the Saturday shooting at the Academy Homes project that sent three boys to the hospital with gunshot wounds.

He's to be arraigned this morning in Roxbury District Court on charges of assault by means of a firearm, assault and battery by means of a dangerous weapon, assault with intent to murder, unlawful possession of a firearm and ammunition, discharge of a firearm within 500 ft. of a dwelling and carrying a loaded firearm on a public way.

Witnesses and relatives told the Globe the attacker just walked up to the boys, 11, 11 and 12, and started shooting.

According to the Jamaica Plain Gazette, thugs at the Bromley-Heath project in Jamaica Plain have a long-standing beef with thugs at Academy Homes.

Seriously- what is it with MA cops killing motorists?

The local police department, state police, and DA have set a world speed record for wagon-circling; we don't even know why the officer tried to pull over the vehicle. Based on previous incidents, it's doubtful anyone will get more than a slapped wrist.

We could consider something like New York's law against shooting at moving vehicles, but numerous police departments have such rules and motorists are still getting killed, so here's a better idea.

Update: The DA has held a press conference. Andre Martins was shot and killed by Christopher Van Ness, who claimed Martins sped out of the parking lot where Van Ness was speaking to another officer. The DA stated "an unknown number" of bullets were fired by the officer ("unknown"? Why? Magic Disappearing Bullets?) Martins was shot while trying to make a U-turn on someone's front lawn, and paramedics said he had some wacky tobaccy hanging from his mouth when they pulled him from the car, which seems slightly unusual for someone who just had a high-speed chase, spun out, hit a cruiser, and was fatally shot.

Rashard Monroe, 17, will be arraigned today in Dorchester District Court on manslaughter charges in connection with the death of Kendell Floyd, also 17, yesterday.

Floyd was rushed to Boston Medical Center, where he was pronounced dead.

This is Boston's 11th killing of the year, the ninth in Dorchester.

Dorchester murders in 2008.