Photo by Jeffrey Hastings Police officers look over the area around 19 Buck St. early Sunday morning as a detective cordons off the residence early in the investigation into the suspicious death of 49-year-old Nashua resident David Smith.

NASHUA – The investigation into the July murder of Buck Street resident David Smith has been “very active” since Nashua police arrived at the scene that night, and it remains just as active today, a top state investigator said Tuesday.

“This has been a very active investigation, and it still is,” Assistant New Hampshire Attorney General Benjamin Agati said. “It’s not like it’s been put on the shelf – I can assure (people) of that.”

Smith, 49, died of a single gunshot wound, and was the victim of a homicide, according to a ruling issued by state Chief Medical Examiner Jennie Duval following an autopsy on Smith’s body.

Police and officials with the Attorney General’s office said at the time that Nashua police were called to 19 Buck St. in the early morning hours of July 8, after receiving a report of a deceased male inside the residence.

Upon their arrival, officers found the body, later identified as that of Smith. Reports that Smith had been tied up, or bound in some fashion, have yet to be confirmed.

This began a process that Agati called “very lengthy.”

He indicated authorities are “looking at a number of different individuals who may have some degree of responsibility” for Smith’s death.

Agati said he and other top law enforcement officials have been meeting with Nashua police regularly over the five months since Smith’s death.

“Nashua has dedicated a lot of man hours to this,” Agati said of the investigators working the case.

He also said detectives who became involved in the investigation haven’t lost touch with the neighbors of the small, single-story home, which is dwarfed by large, multi-unit apartment buildings along narrow Buck Street.

And while some have been helpful, others, not so much, Agati said.

“A number of neighbors have helped us out, but there are some who haven’t been forthcoming. It’s been a challenge,” he said.

Agati and Nashua police ask anyone with any information on the incident, especially anyone who interacted with Smith on July 7, to contact the Nashua department at 603-594-3500.

People can also report information anonymously by calling the Nashua Crime Line at 603-589-1665.

Dean Shalhoup can be reached at 594-1256, dshalhoup@nashuatelegraph.com, or @Telegraph_DeanS.