with too many of them together because then they attract our attention, the police, and they know that we’ll start doing what we do and investigate. So you’ll see 1, 2, 3 guys walking around on one side of the block and the same time, you’ll see another couple of guys on the other side of the block. They’re working together. . . .”
We fail to see what it is defendants find deficient in the foregoing showing. Villanueva explained the gang signs and colors used by the Broderick Boys to identify themselves and put others on notice. He explained the offenses typically committed by gang members and that assaults are used by gang members to maintain fear and control. Villanueva also described the structure of the gang, including who makes the major decisions and who carries them out. Finally, he described how gang members work together to patrol their turf. Investigator Villanueva explained that his opinions and observations are based on hundreds of contacts and discussions with gang members, investigation of hundreds of crimes committed by gang members, and review of hundreds of police reports.
Defendants argue Investigator Villanueva’s opinions and observations are refuted by those of their own gang expert and the more than 100 declarations of residents and others familiar with the Safety Zone. However, this was an issue of credibility for the trial court. “Where the evidence before the trial court was in conflict, we do not reweigh it or determine the credibility of witnesses on appeal. ‘[T]he trial court is the judge of the credibility of the affidavits filed in support of