You're missing what she herself said. Something to the effect of "I can't believe I didn't see anything" when she drove down Herron Rd.
That means she drove down the road just prior, during, or just after the event. Just after means emergency crews would've been there==so she would've seen *something,* which means she drove during or just prior. As we've said on here, she's putting herself at the crime scene.
It's a bizarre, out-of-place statement.
Also missing there is NO way, zip, zero, zilch, someone would use Herron Rd. to get to Lake Enid. Unless they lived on Herron Rd.