Jeralyn Merritt tracks the evolution of a witness's story from her first 911 call on through various media appearances.
This is the 'mystery witness' on Anderson Cooper, who saw little and heard less, but has been getting more emphatic over time. My snark for the first Cooper interview - "Anyone autotuning that should include "Getting dark, too dark to see; feel like someone's knocking on heaven's door".
That said, the O'Mara defense team will be going through this exercise to prep for this possible witness. If they are smart (and want to hold down the billable hours), they will start with Ms. Merritt's work.