There, police say officers found Parrish and another man inside a white colored Ford Bronco parked at a local gas station.
Police add, they found a loaded handgun in Parrish's possession when they made the arrest.
Investigators say Parrish was wanted for killing his girlfriend, Victoria Adams, 21, and their son Sidney Parrish, 2, in Monroe County, Pa.
The bodies were found in a home on State Road 115 in Chestnut Hill Township, Monroe County on Monday night.
Both had been shot.
Parrish is charged with Criminal Homicide, Attempted Criminal Homicide and Aggravated Assault.
The other man in the Bronco, Conrad Jankowski, was also arrested and charged with Hindering Apprehension, a felony.
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