Former reality TV star Duane Chapman, known as 'Dog the Bounty Hunter,' told the Mansfield News Journal that he's been hired by a friend of the family.
The search is now focused in Ohio, where police found a truck they think Christy stole on the side of a highway on Sunday.
Search for Trump threat suspect shifts to Ohio
A federal warrant was issued in June for the 27-year-old in connection with Facebook posts threatening to shoot President Donald Trump and a district attorney in the Lehigh Valley.
Father of Pennsylvania fugitive Shawn Christy speaks out