Son of Sam was not a sniper - he was a cold-blooded killer with a 44 mag pistol. All other snipers sniped from one location. In this case, they rove around at random and it is almost certain more than one man is involved. Ever hear of a sniper with a buddy? See the diff?
Don't know if anyone else answered your question...
This was on Fox News...Rita Crosby said the LEOs were surprised when the bloodhounds took off for quite a ways tracing the scent toward or into the Beltway....That of course would mean the shooter was on foot, and either meeting up with someone or returning to his parked vehicle.