Feds Detail Boylston/Mozart Feud as 66 Alleged Gang Members Arrested

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Jassel "Shells" Castillo, from a federal affidavit

U.S. Attorney's Office

Jassel "Shells" Castillo, from a federal affidavit

Jassel "Shells" Castillo, from a federal affidavit

U.S. Attorney's Office

A dragnet collared more than 60 alleged gang members in the Boston area early Thursday. The Boylston Street and Mozart Street gangs, which trace their origins to JP, figured prominently in the allegations laid out by federal agents.

The U.S Attorney's Office in Boston announced the arrests Thursday, saying they capped a year-long investigation into a "gun and drug pipeline" snaking across Eastern Massachusetts.

The feds also released a 23-page affidavit supporting the charges. It detailed an alleged murder attempt by Boylston's Jassel "Shells" Castillo on a Mozart rival. The shooting took place on Kittredge Street in Roslindale. The target survived.

According to the affidavit, Castillo was recorded saying this about the shooting:

"That hit, I just missed, bro. But, bro, the first shot I aimed it at his head ... Yo, I swear to God when [he] seen me, he seen death."

The bulk of the charges issued Thursday involved alleged crimes outside JP in East Boston, Chelsea, Brockton, Malden, Revere and Everett.

The listing of persons arrested contained only one whose address is clearly in Jamaica Plain: Anthony "Squirrel" Terrones, 30.

Authorities have over the years pegged much of JP's worst violence to the longtime rivalry between Boylston and Mozart. For instance, the feud left three dead in a shoot-out at Same Old Place in 2010.

Below is the full federal affidavit.

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