Eggs-zackly. Inside 200 yd. range, stationary taget, flat trajectory round. All point to an amature with a serious attitude problem.
Case against ex-military sniper:
Brass being left behind.
High traffic areas.
All torso shots. No head shots
First attempt was a miss (through a window)
So far has violated first rule of sniping...one shot, one kill (2 victims survived), perp is using the civilian rule of one shot then skedaddle.
Makes the case for the amatuer with the Wal-Mart purchased Ruger and a chip on his shoulder for the cops (taunting).
First attempt that missed could have been a range check on a sucky weapon. Brass left behind was meant to be seen.
Snipers dont talk to their enemy. This person wants to be known, and he is. If he did everything right from a sniper perspective, then everyone would be thinking terrorism and looking outside rather than in.