I wouldn't say the GJ testimony says that as we don't know what Andrews was thinking, but it shows a lack of coordination and pre-planning as EN only saw the Buick after Andrews started veering rather than EN telling Andrews to veer because he saw the Buick. The Buick probably was harder to recognize as BM testified that the car was parked straight rather than in profile. Also having grown up in a cul-de-sac cars have to turn or else they'd drive straight into someone's house. Countless number of cars turn in cul-de-sacs and it doesn't mean all those cars were engaged in premeditated murder attempts by trying to position the car for firing, but instead that's just how you drive in a cul-de-sac.
I wish Mogg's testimony in that section wasn't so meandering and convoluted. It's hard to follow, but as best I can determine, this is the order of events leading up to the shooting from EN's point of view:
1. EN told DA something about a way to get to his (EN's) home.
2. DA turned into the cul de sac and turned the vehicle sideways.
3. EN saw the Buick and recognized it as the car that had been stalking and chasing him that night.
4. EN saw "heads in the vehicle" and someone running toward the house and thought that the running person was going to get more guns.
5. EN started shooting.
Based on that, it's simply
not possible to draw a conclusion that they went into the cul de sac because they knew the Buick was there, or that the killing was premeditated, or even that DA turned the vehicle sideways so that EN could shoot.
Some conclusions that we
can draw:
1. EN was trying to give DA directions to take EN to his home.
2. EN was still afraid of the people in the Buick they had already stalked him at the park, pointed a gun at him, and chased him that night. He thought the running person was going to get more guns.
3. EN didn't know which of the people, or how many of them, had a gun. He knew that at least one person did, but he couldn't have known which of them had a gun, or if any of the "heads in the car" had guns.