"Based on topography as reported by woman who lives in nearby apartments(sharp sloping area adjoining this street) . . .wonder if an echo effect could also be considered...just a thought...or richochet of fragments..."
could be; and we may never know, whether it was 'sound effects' or even 'two in the air' for the fun of changing the MO the media has inadvertantly created. . .
If there was more than one shot whos is to say that maybe one of the bus drivers took shot into the air or at the woods to scare off the perp and to let him know he is prepared to fight back.