The Bounty Hunter.

Milo Boyd, a down-on-his-luck bounty hunter, thinks he's seeing an upswing in fortune when he gets a call to bring in his bail-jumping ex-wife, a reporter named Nicole. Milo considers the job an easy payday, but Nicole quickly escapes to chase a lead on a murder case. The former spouses play an escalating game of one-upmanship, until they suddenly find themselves on the run for their lives.