(54:33), there's something interesting we all missed.
On the Zimmerman/Singleton map,
GZ's markings include a rectangular blob that has always puzzled me, since it doesn't seem to be mentioned in the associated part of the interview recording. It's on Retreat View Circle, between Taaffe's building and the clubhouse.
In her trial testimony Singleton indicated an X within the rectangular blob, more visible in the color version, as TM's location when GZ first sighted him. It is on the street in front of 1320 RVC, the 2nd unit of the building next to Taaffe's. It is very close to the division between the 2nd unit and the 3rd (1330 RVC).
This location is obviously some distance from the one indicated in the reenactment
(1:23). Using Google Earth ruler, I estimate 180 feet.
Serino may be confused in her recollections. The map appears to have an 'X' closer to the reenactment location (blow-up).
OTOH, the map also shows GZ to have already passed the reenactment location when GZ first saw TM (video,
53:46). That's a minor anomaly I noticed long ago but never thought worth mentioning. In combination with Singleton's statement about the markings in front of 1320 RVC, it suggests a picture somewhat different than that indicated in the reenactment.