MONTEREY — Concordia Parish Sheriff’s Office investigators say they are pursuing suspects and have interrogated others they believe are connected to the recent killing of a 63-year-old Monterey man.

CPSO Chief Deputy David Hedrick said Friday investigators were making progress on the investigation into finding out who killed Wisner native John Perritt at his Eloise Road house in Monterey.

Hedrick declined to release further details of the suspects being interrogated or more information about the case, including Perritt’s cause of death, for fear it would endanger the remainder of the investigation, he said.

Evidence collected from Perritt’s car, which was found Tuesday across the river in Natchez, was delivered to a crime lab in Shreveport Friday, and Hedrick said the lab would begin processing the evidence Monday.

“We should have the results of that soon, and we’re hoping to get some concrete information from that,” Hedrick said. “Our guys are working nonstop on this case, and any lead is going to help us find out who did this.”

Perritt was found dead at his house Monday where his body had apparently been for some time.

A friend was grading a road near the house, Hedrick said, and called police after the man smelled something foul and saw a blanket with what appeared to be a human foot sticking out from beneath.

The decomposition of Perritt’s body required an autopsy by the Louisiana Forensics Center in Lafayette to help determine an exact identification, Hedrick said.

The sheriff’s office is treating the case as a homicide.

An alert was issued Tuesday morning on a 2014 black Ford Fusion that police believed was a point of interest in the investigation.

The Fusion was later identified as Perritt’s car, which was found by Adams County Sheriff’s Office deputies in Natchez.

The ACSO processed parts of the car Tuesday evening for any potential fingerprints, DNA and blood samples.

Concordia Parish Sheriff Kenneth Hedrick said increased patrols were ordered in the Monterey area for the safety of residents until a suspect in the case is identified and apprehended.

Anyone with knowledge of the crime is encouraged to contact the sheriff’s office at 318-336-5231.