"Investigators have declined to give any information regarding the significance of these locations but asked those who were in the highlighted areas on the evening of July 18 to contact law enforcement with any information regarding who and what they might have seen."
It's ambiguous at best. Asking for anyone who was at the dots could still be ruling out a ping from a random person who happened to be there from 7-10. So, how do you suppose they got the dots? I'm beginning to think they threw darts at a map.

Thank you.