The Skiptracer

The unnamed Skiptracer is the secondary, later true main antagonist of the 2013 film, Identity Thief.

He is played by Robert Patrick, who also plays the T-1000 from Terminator 2: Judgment Day.

Summary
The Skiptracer is also a bounty hunter hired to track down the fake Sandy Patterson. He eventually finds her and captures her, but the real Sandy Patterson pursues him and rescues her, wrecking the former's van in the process. He then decides to kill them instead. The Skiptracer shoots Marisol and Julian and locks them in the back of their car, and then pursues Diana and Sandy in an effort to kill them. He is ultimately arrested along with Marisol and Julian.