First please know that I'm not being short with you, I just find this incredibly annoying and if I was to be this vague in my job I wouldn't have been around long........
To me, there's a difference between "day of" and "around the time", with the latter being a bit more specific. Furthermore, is a car(s) on Babbling Brook "around the time" her body was found a mile away on Cindy Lane significant? If so, why? Wouldn't cars on Cindy Lane/Round Rock be more significant "around the time" her body was found?
IF there is only one home w/ cameras on the north end of Babbling Brook and these cars came in from the north (keep in mind house/camera faces east) and exited on the south end, is it even significant that they didn't see them come back the way they came? Is there another reason they know that they lingered (i.e., other surveillance in other parts of the neighborhood, for example).
Sorry, but the horrible communication from LE & MSM is getting very annoying. Details DO matter. And you won't catch a Great White tossing out minnows.....