[TampaFla]

I'd suspect they worked lose. Had that happen once (felt tight but after driving 35 miles started hearing a clicking sound- apparently one wheel was not fully seated when the lugs were tightened at the tire "dealer" (happens more often than they like to admit - i.e, the guy assigned to tighten lug nuts (in a dealer's shop) is usually the guy who has that at the top of their "skills" list.

If somebody wanted to kill the owner or wreck the car there's lots easier, better and far faster ways (particularly considering where it was parked).