Much as we like to imagine that LE has eyes on their prime suspects, from the cases I've followed, I don't think it works like that. The personpower and cost of that would be astronomical. Instead LE gets warrants and tracks vehicles.
In the Stauch case, there was much vehicke swapping and during the early days while LE had a clear POI, unnamed publicly, it wasn't until AFTER vehicle data was pulled on subsequent vehicles that LE was able to determine some of the alleged murderess's movements....
Entirely possible someone was able to travel freely to Indiana, for example, and back without LE immediately knowing, inky eventually knowing when other means of tracking revealed it.
My point: IMO it's not real-time tracking. It's back-tracking.....
And we don't know how many vehicles one landscaper had access to.....
Thankfully he'd not as clever as he thinks he is or he'd have boxed LE out instead of LE caging him in.
But that's just my opinion.