One government agency I was working for several years was Public Housing. I saw and learned all the tricks dudes have to steal in properties.
What it follows is just a hypothesis.
The dude saw an empty house. So, he first decided to make a "survey" . He went to the back of the property and "minutes later" came out thru the front door.
Probably there were construction equipment inside the building, or no tools at all but he checked if the water pipes are copper. Copper pipes are one of the primary targets to be stolen from vacant units in Public Housing buildings, the burglars sell them by weight on the recycling centers. It is good money.
The dude must have called his people to come back later on and commit burglary. After that he went out of that property and go to his people (family or friends) to make plans for returning to that house later on... OR... the dude found nothing of value and just decided to visit friends.
Point is that is very suspicious seeing the dude entering inside a property without permission. According to experts, such is just misdemeanor. However, if the dude will return back alone of with others to finally steal something from the empty property, then such will be a crime.
I understand completely the incident with the gunshot could be avoided at some point, however I don't buy the version that the dude was just jogging, specially after knowing he entered to an empty house without permission minutes before.
If I'm the investigator, I will check his phone calls or texts, if any. It is very important to know the most it can be known about the victim before the shooting. And to know to whom and why he contacted others on that day.
I don't say the dude was a burglar, but on the contrary, to check that he wasn't.