The defendants were gunning for a member of the rival 62nd and Callowhill Street gang when Fleming drove by the corner and Brown fired a handgun through the front passenger window, according to trial testimony.
"It's about pride and it's about not letting anyone disrespect you. It's about turf," Assistant District Attorney Jack O'Neill said last week in explaining to the jury the basis of the gang feud that claimed Harvey, who was not involved with a gang.
Judge Genece E. Brinkley immediately sentenced both defendants to life sentences without the possibility of parole for the murder count and to concurrent sentences of 13 1/2 to 27 years for the other two counts.
The announcement of the guilty verdicts led members of the defendants' families to wail in disbelief and bolt from the courtroom.
"I'm sorry, Mom," Fleming said, looking over his shoulder, before his mother fled the room.
After leaving the courtroom, Monique Harvey said: "I'm very, very, very pleased with the verdict. I prayed on it. I promised Yasin a verdict of justice for him, and I believe that I received that today."
"He was a very lovable, likable kid. His family loved him. He was just a good kid," she said of Yasin, who attended University City High School.
That February, a 64th and Callowhill member and Brown's best friend, Stephan Hamilton, 21, was shot and killed. Fleming himself was kidnapped, robbed and beaten that March 27, and Fleming shot and injured a 62nd and Callowhill member later that day, O'Neill told the jury.
Kareem Terry, 21, a 64th and Callowhill member who testified for the prosecution in exchange for immunity from prosecution, told the jury that he was in the back seat of the car as Fleming ordered Brown to open fire on the man who they believed had killed Hamilton.
Defense attorneys Jack McMahon, for Brown, and David Mischak, for Fleming, argued that Terry was the gunman and that the prosecution had made a deal with a cunning murderer.
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