A Suffolk Superior Court jury late this afternoon convicted three men in connection with the 2009 shooting death of 18-year-old Paula Castillo as she leaned out of the window of a Hyde Park home, District Attorney Daniel F. Conley announced.

Jurors convicted RUBEN SANCHEZ (D.O.B. 9/6/90), a Hyde Park man, of second-degree murder, unlawful possession of a firearm, and carrying a loaded firearm. Likewise, they convicted both MIGUEL VASQUEZ (D.O.B. 5/5/91) of Boston’s South End and ANDRES BREA (D.O.B. 1/25/90) of Roxbury of unlawful possession of a firearm and carrying a loaded firearm; jurors acquitted Vasquez of a third charge of assault by means of a dangerous weapon, and deadlocked on a count charging Brea with accessory after the fact to assault by means of a dangerous weapon.

Judge Raymond Brassard revoked bail for all three defendants and scheduled sentencing for July 6.

Assistant District Attorney Jennifer Hickman proved that on the evening of Sept. 19, 2009, the three defendants attended a party being held for Castillo at 28 Hillis Rd.

At around 3 a.m. on Sept. 20, Vasquez became engaged in an argument with the hostess of the party, and all three men were asked to leave.

The defendants complied, but they continued to exchange words as they went outside. They walked out to Brea’s red Honda Civic and Sanchez pulled out a gun; at the same time, Castillo was leaning out of the second-floor window.

Sanchez pointed the gun at the Hyde Park home and fired several shots, in what Hickman described as Sanchez’s way of “sending a message” to the people inside.

Castillo was struck in the neck and died a short time later after collapsing on the kitchen floor of the apartment.

Sanchez, Vasquez and Brea subsequently got into the Honda and fled the area.

When Boston Police officers responded to the scene, they observed blood in the hallway, on the stairs, and on the walls. Officers were able to get important information from witnesses, and were able to provide important information to police. That information, together with a description of the motor vehicle that fled the scene, and a rapid police response, led to officers within minutes locating and stopping a car that matched the descriptions provided by witnesses.

Hickman further proved that Sanchez tested positive for gunshot residue.

In the trunk of the car, officers found a revolver. That revolver had five rounds, four of which had been discharged, with one live bullet in the chamber.

Kara Hayes and Jennifer Sears were the advocates assigned to the case. Sanchez is represented by attorneys Michael Doolin and William Keefe; Vasquez is represented by attorney Daniel Solomon; and Brea is represented by attorney Eleftherios Travayiakis. Sentencing will be in courtroom 808 of the Suffolk Superior Court.