First camper arrived around 4:35. It's very possible that the first camper was the "passerby". It certainly is huge because based on the witness report, there wouldn't have been anyone else leaving the church at that time except for SP. What we don't know is whether SP was alone in the SUV, or if one or more others were in that vehicle, or if the Altima is connected.
The SW was executed, an SUV and other items were seized from the home, but this was 10 months ago. It has not resulted in an arrest for murder as of yet. It's possible he was cleared. Also possible that testing is taking a long time, or that results weren't conclusive enough for an arrest.
Since we don't have action after 10 months, I suggest the focus of the discussion shouldn't be the POI but the fact that (1) a dark SUV was seen leaving the church; and (2) MPD sent video surveillance footage of multiple POIs to a podiatrist expert, who studied their gait in relation to the SP video. But alas, we don't know who the POIs were, other than the one that was the subject of the SW. We can make guesses as to some of them from the first SWs - people like CW, AT and CT, etc.
The podiatrist expert was able to rule all the supplied POIs out based on their body type/gait, except for the one subject of the SW. But that doesn't make him guilty. They just might not have identified the right POI yet.