[Mariner]

Two men willing to act just like the Terminator, scavenging cash and cars along the way, might get far.

Ditching the bodies in inconspicuous places at night.

Different car/victim every 8-12 hours. Nothing but cash. Smashed smart phones.

[Mariner]

Those guys are 1/2 way to Mexico by now, traveling state and county highways.

[Steely Tom]

By now at least one of the victims would have been reported missing by family members.