Edit: Since this forum bleeps out R3ddit, go to r/CyclistsWithCameras.
/r/CyclistsWithCameras/comments/bp01zl/us_my_hit_and_run_driver_got_caught_cameras_ftw/
There were eyewitnesses. None stopped to help or provide testimony, and as stated before there is no legal obligation to do so. There may have been CCTV footage from a nearby building, but aside from it not being a guarantee the owner of said security cameras doesn't have to hand over the video unless subpoenaed (also assumes they keep the footage for a while).