Police said Jamar Tucker, 36, of Trenton died from a gunshot wound.
Pennsylvania State Police and local authorities were called to the 300 block of S. Bellvue Avenue around 8:30 a.m. Friday.
Police investigating man's death in Langhorne
They said a dog walker spotted the body and flagged a passing motorist, who then called 911.
Investigators are now searching for Tucker's black 2012 Jeep Grand Cherokee with the tag T69HDG.
Below is a picture of a similar model.