NORTHAMPTON, Mass. — A well-liked local dentist was found dead last week along the Connecticut River Oxbow in what investigators are calling one of the most unsettling homicides they have ever seen.

Dr. Carl Maretti, 34, of Northampton, was discovered early on the morning of March 24 by a passerby who noticed something unusual near the water's edge. What the witness found and what responding officers later encountered has left even seasoned detectives struggling for answers.

THE DISCOVERY

Maretti's body was found lying on a flat rock about 15 feet from the water at the Oxbow, a quiet conservation area popular for birdwatching and walks. He was fully clothed, but investigators quickly noticed several unusual details.

According to sources familiar with the case, the dentist's hands and left foot were missing, removed with precision and never recovered. His chest had also been opened. The cause of death: blood loss. But at the scene, there was almost no blood.

"Whoever did this took their time," a source close to the investigation said. "This wasn't chaotic. It was methodical."

AN UNSETTLING DETAIL

Autopsy findings have only deepened the mystery. Maretti's rib cage had been opened along the back, and his lungs were partially pulled from his chest, not cut out...pulled. The work appeared incomplete.

"They were trying to remove the lungs," the source said. "But it looks like they didn't finish. Either they were interrupted, or they were still learning."

Where the rest of his blood went remains unexplained. The scene was nearly bloodless, suggesting Maretti was killed somewhere else and then brought to the Oxbow.

WHO WAS CARL MARETTI?

To those who knew him, Maretti was an unlikely subject of any crime, let alone one this strange. A graduate of the University of Connecticut School of Dental Medicine, he had run a private practice in Florence for the past six years. Colleagues described him as meticulous, gentle, and deeply involved in his community.

"He was the last person you would expect something like this to happen to," said Dr. Sandra Liu, a fellow dentist who shared office space with Maretti. "He was quiet. Kind. He didn't have enemies. He didn't even have arguments."

Maretti lived alone in a condominium on Bridge Street. Neighbors say he left for work on the morning of March 23 and never came home. Police have not identified any suspects or persons of interest.

WHAT INVESTIGATORS ARE SAYING AND NOT SAYING

• Motive: Police have not publicly identified any possible motive.
• Suspects: No arrests have been made. No one has been named.
• Weapon: The tool used to open Maretti's chest has an unusual shape. Its markings don't match any weapon in state or federal databases.
• Missing parts: Maretti's hands and left foot have not been found.
• Blood: Investigators have not explained where most of his blood went.

The Northwestern District Attorney's Office has declined to say whether the FBI is involved or whether behavioral profiling is being used.

'THIS WAS RITUAL'

Veteran homicide investigators consulted by Boston 25 News say the Maretti killing has hallmarks of ritualistic behavior, and not the work of an opportunistic predator.

"This wasn't about killing," said retired Massachusetts State Police detective James Holloran, who worked dozens of homicides over a 30-year career. "This was about something else. The removal of specific body parts. The draining of blood. The positioning of the body. The incomplete removal of the lungs. That's ritual. That's someone following a script."

Holloran noted that the lack of blood at the scene suggests the victim was killed elsewhere and transported... that's not a disorganized one. "Whoever did this had time. Had a plan. Had a location where they could do this without being seen. And then they brought him to the Oxbow and left him like an offering."

A COMMUNITY ON EDGE

In Northampton — a city known for its college, arts scene, and reputation as one of the safest small cities in Massachusetts, the killing has sent shockwaves through the community.

Local businesses along Main Street have reported a drop in evening foot traffic. Police have increased patrols near the Oxbow and along the riverfront.

"I have lived here my whole life," said Tom Ashworth, 58, owner of Ashworth Hardware. "Nothing like this has ever happened here. You hear about this stuff in big cities. Not here."

A candlelight vigil was held on the Northampton courthouse steps on March 30. About 200 people attended.

A KILLER STILL FREE

As of now, no arrest has been made in the killing of Carl Maretti. Police say they are reviewing surveillance footage, canvassing the neighborhood, and conducting forensic analysis on evidence from the scene. They have not released a description of any suspect or vehicle.

"We are asking for the public's help," Detective Marcus Cole of the Northampton Police Department said in a brief statement. "If you saw something unusual near the Oxbow between the evening of March 23 and the morning of March 24, any vehicle, any person, anything out of the ordinary, please call us."

A dedicated tip line has been established: (413) 587-1105.

WHAT COMES NEXT

The Maretti family has asked for privacy. A funeral was held privately on April 1. Maretti's dental practice remains closed, with a sign on the door reading "Until further notice."

For residents of Northampton, the question is no longer if a killer will be caught, but when, and who will be next.

"We are all looking over our shoulders now," said Delia Rawlings, 44, a mother of two who lives less than a mile from the Oxbow. "The police say they are investigating. But they are not telling us anything. And that makes it worse."

This is a developing story. Check back with Boston 25 News for updates as investigators process new leads.