To be fair, lesser models won't do. You need a rock solid autofocus system that can accurately focus track a speeding vehicle. That's available only on the high end (professional) models from Nikon and Canon. But to the govt it's not a big deal. If 22 were stolen, they will order 22 more. And if those get stolen too then another 22...
They wouldn’t use autofocus. The cameras would have the lens locked at a certain focus point. They would use the professional bodies for their long life and networking abilities.
At least some heroin addicts found something to steal that no one will complain about.