It was just after 3:00 p.m. Thursday when police were called to the Parkside Manor Apartments in the 1400 block of Parkside Avenue.
There, officers found a man murdered in his apartment.
The man has been identified as 22-year-old Jared Littlejohn of Trenton.
Police are looking for a beige Chevrolet Impala with New Jersey license plate L94-CMN believed to be the suspect's vehicle.
Ewing Township Police and the Mercer County Prosecutor's Office are investigating.