It was no hitman that was hired. From the video I can see that the shooter had little shooting skill and little tactical skill. The shooter did not know enough to lock out his shooting arm which could have contributed to the jams. He might have not known enough to use 147 grain rounds to increase cycling power and to be subsonic. I'll bet it was just revenge for a relative being denied insurance benefits. He had written on the shell casings, "Deny, Defend, Depose” likely be cause insurance companies deny a lot of claims on flimsy excuses to avoid payouts. He escaped on a rented ebike which can be tracked.