The amazon driver wasn't even shot, it was the middle of the day and some nutjob in Pittsburgh flipped out over his driveway being blocked. The other one was a year ago, and specifically had no racial component in the charges because it was a stranger on the porch of an 84 year old who lives alone at 10pm. But let's pretend it was an old guy who went hunting for a black guy and is the one who showed up to his house to shoot him. One shooting over a year ago isn't a "pattern", it's one shooting, compared to 1800 homicides of seniors in the same year, because old people who live alone are targets for burglary, and there aren't many other reasons a total stranger would randomly show up to their house at night.
Again, we already know the reason in this case, because the lady who got shot was sent there by the same scammer, and the cops even talked to the scammer when they answered the guy's phone.