The 21-year-old Roxbury man didn’t know about the dispute that would claim his life when he stopped to talk with a group of friends on Maywood Street on the evening of Feb. 13, 2007, a Suffolk County prosecutor told a Superior Court jury this morning.

“For Fausto Sanchez,” Assistant District Attorney Julie Higgins said, “it was the ultimate example of being in the wrong place at the wrong time.”

Sanchez, Higgins said, was shot dead by two men: EMMANUEL DASILVA (D.O.B. 10/24/84) of Roxbury and his uncle, JOSEPH GOMES (D.O.B. 4/20/67) of Hyde Park. The pair was looking for another man they believed had fired shots in the area of Dasilva’s Langdon Street home, and Sanchez’ group was standing in the vicinity of that man’s residence.

“The defendants were on a mission,” Higgins said. “A mission to finish what had started earlier that day. The defendants were on a mission to kill.”

Dasilva and Gomes are both charged with first-degree murder for Sanchez’ homicide. They are additionally charged with multiple counts of armed assault with intent to murder, assault with a dangerous weapon, and assault and battery with a dangerous weapon for shooting at Sanchez’ friends and striking two of them.

With Gomes behind the wheel and Dasilva in the front passenger’s seat, the pair allegedly approached the scene in a silver 2006 Chevrolet Impala. They came to a quick stop near 39 Maywood St., lowered the window, and fired the fatal volley, Higgins said. Then they sped away.

Just minutes after the shooting and just a block away from the scene, Higgins said, a Boston Police detective was “in the right place at the right time” to observe the defendants’ vehicle as it drove away from the mortally wounded Sanchez and his friends. When the detective stopped the vehicle and Dasilva exited, two spent shell casings fell out. Four more casings were found in the car.

“Those spent shell casings connect and link these two defendants to Fausto Sanchez’ murder,” Higgins said.

The two were arrested, Higgins said, but the investigation did not stop there. It continued for three months on the street and behind the closed door of the Suffolk County grand jury before Dasilva and Gomes were indicted for first-degree murder.

Higgins is trying the case with Assistant District Attorney Gretchen Lundgren. Jennifer Sears is the DA’s assigned victim-witness advocate. Dasilva and Gomes are represented by attorneys Larry Tipton and Peter Muse. Testimony is ongoing before Judge Raymond Brassard in courtroom 815 of Suffolk Superior Court.