172 driver:
I don't trust the ADS-B plot to perfectly reflect turns.
No doubt about that. But, it generally shows what happened. The FAA has great data, though, but we will never see it because, alas, the NTSB didn't get involved.
The SoCal TRACON, like all FAA mega-TRACONs has Fusion radar; i.e. all the radars they are using are in a matrix. Their radar recordings are impressive, no doubt. But, since the FAA is investigating itself, those data will not see the light of day.