Did you happen to notice if the security guard drove a vehicle by chance?

My husband and I have noticed a small white/beige pickup truck driving back and forth on the Oquirrh Lake Rd/Dr when we are walking around the lake in the early morning (5 am - 7am) for the last couple of days. The driver hasn't said anything to us, but the truck did pull over and stop today and seemed to be watching us (we were on the inside loop of the lake) and drove away as we got closer to crossing the bridge across the street from Lake Bridge Dr. Yesterday, we were on the path closer to the road, but didn't think much of it and figured it was someone picking a resident up from their house and then driving back out of the neighborhood (drove by twice in a short period of time). It wasn't until we saw the same truck again today driving back and forth (and also stopping and watching us) that we started thinking that something is strange/possibly insidious about the situation.

I am wondering if this is a "security guard" or some other bad element that appears to be stalking our neighborhood. Since we were on the opposite side of the lake, we couldn't see a license plate. I find it to be rather creepy though. If it is security, I would hope they would drive some type of a marked vehicle. If it is not, it is scary to think what that person is doing "dragging" Oquirrh Lake Rd/Dr.